Uniclass L73144 CI/Sf6 S2 (52.5)
November 2011
ACO Building Drainage
Drainage Systems
Product catalogue and specifiers design guide ACO Building Drainage Watertight Rainwater Outlets for Flat Roofs and Other Areas
ACO Building Drainage
ACO building drainage ACO Building Drainage is a division of ACO
Our built environment is becoming ever more
Our global resources and fabrication capacity
complex. Applications are becoming more
make it possible for us to deliver best value,
Technologies plc and part of the worldwide
sophisticated and the increasing pressure of
both with our standard products and with our
ACO Group. The Group has sales in excess of
regulations and standards make achieving
bespoke designs. Confidence is further
ÂŁ600 million worldwide with production
design, performance and financial goals ever
assured with quality systems that are in
facilities in the UK, Germany, France,
tougher.
accordance with ISO 9001-2008.
Switzerland, Denmark, Spain, Poland, Czech
ACO Building Drainage is a new concept
ACO Building Drainage’s extensive portfolio
more than 3500 people are employed in 40
within the ACO Group. Our mission: to
includes:
countries throughout the world.
eliminate design risk, to reduce installed and
Roof/Balcony drainage systems
Republic, Australia and the USA. In total
life cost and to deliver exceptional finish and performance in every product application.
Stainless steel gullies Standard stainless steel and galvanised
We achieve this through three factors:
steel channels
High performance materials
Bespoke channel drainage systems
Design experience and project support
Stainless steel socketed pipe system
Global manufacturing capacity
Stainless steel and aluminium access covers Anti-flood backflow protection systems Wetroom and shower drainage Grease Management systems
2
Tel: 01462 816666 Fax: 01462 851490 e-mail Enquiries: buildingdrainage@aco.co.uk website: www.acobuildingdrainage.co.uk
Watertight Rainwater Outlets
Contents
Introduction Flat roofs
4
The need for rainwater outlets
4
Design considerations Hydraulic design considerations
5
Effective catchment area of roofs
6
Product ranges Index to HP product ranges
8
Introduction
8
Description
8
Product features
9
HP range accessories overview
9
HP product selector
10
Technical information and order data
11
HP range accessories selector
20
Raising rings and adaptors
21
Deck support and terrace gratings
22
Appendices Index to appendices
23
Appendix 1 - material selection
24
Appendix 2 - typical roof construction detail
25
Appendix 3 - installation guidelines
29
3
Watertight Rainwater Outlets
Introduction Flat roofs
The need for rainwater outlets
Over the past few years, there have been
Any flat area needs careful design to ensure
To overcome this potential problem, ACO
major advances and improvements in the
efficient removal of surface water.
Building Drainage rainwater outlets provide a
materials used in modern roofing technology.
Traditionally, water from a flat roof or other
watertight joint between the membrane and
The specifier now has renewed confidence to
structure is channelled by way of a slope
the outlet by mechanically clamping the
take full advantage of the benefits of a flat
to a rainwater pipe. Leaks can often occur
membrane to the sump unit. Tried and tested
roof and low pitched roof design concept.
at the junction of the membrane and the
for over 40 years, ACO Building Drainage
rainwater pipe.
outlets have been used successfully on all
Flat roofs allow greater planning and design
types of flat roof construction.
flexibility - roof-top gardens, terracing, patios, car parks, building services and ventilation equipment, delivery areas and provision for adding additional storeys at a later date. All can be accommodated in a flat roof design.
Extensive or irregular shaped buildings can be roofed more quickly, easily and cost effectively than a pitched roof.
Internal condensation is less of a risk because a flat roof uses less airspace than a pitched roof. In addition, the need to heat and illuminate voids is eliminated.
Flat roofs allow easy access to natural light and because of the simple construction, internal partitioning is easy. This is especially advantageous for commercial or industrial buildings.
4 HP (High Performance) range of outlets provides rainwater drainage solutions for a wide range of applications.
Watertight Rainwater Outlets
Design considerations Hydraulic design considerations Overview
Geographical location
Flow rate calculation
The following notes are intended as a guide to
Rainfall intensity has a direct impact on the
The flow rate Q, from roofs, paved areas and
the specifier who is designing a rainwater
performance requirements of any rainwater
vertical walls and surfaces is calculated as
drainage system for a roof. It is recommended
drainage system. For roofs and paved areas,
follows and assumes that all surfaces are
that reference is made to British Standard BS
it is normally impracticable to guard against
impermeable:
EN 12056 : 2000 Gravity Drainage Systems
very infrequent, extremely heavy rainfall
Inside Buildings - Part 3 : Roof drainage,
situations and so the designer should aim to
layout and calculation for a comprehensive
strike a balance between the cost of the
design guide.
drainage system, the risk category of the building and the frequency and subsequent
For any rainwater drainage system to work
consequences of flooding.
effectively and reliably, due account must be taken of the following considerations:
Q = A x I litres/second 3600 where Q = Volumetric flow rate (l/s) A = Effective catchment area (m²)
The drainage system for roofs and paved
I = Rainfall intensity (75mm/hr)
areas should be capable of coping with the Geographical location
intense rainfall that accompanies summer
Rainfall intensity
thunderstorms.
Effective catchment area of roof Risk category of building
The UK experiences complex and varied
Hydraulic capacity of the drainage
rainfall patterns. For example, surprisingly,
system(s) employed
although the upland areas of northern and western parts of the British Isles experience higher average annual rainfall than the lowland areas, the lowland areas experience more frequent and more intense short duration rainfall than the upland areas. British Standard BS EN 12056 : 2000 may be referred to for further information and guidance on this topic.
5 A rainfall intensity of 75mm/hr (0.02 l/s/ m2) is used throughout this design catalogue.
Watertight Rainwater Outlets
Design considerations Effective catchment area of roofs
Pitched roofs
Flat roofs & paved areas
The effective catchment area of a freely
For a monopitch flat roof or paved area with a
exposed pitched roof draining to an eaves or
freely exposed horizontal surface, the effective
parapet wall gutter is equal to the plan area of
catchment area is equal to the plan area of
the roof plus half its maximum elevation area.
the area to be drained as shown below:
Figure 1. Pitched Roof
Figure 2. Monopitch Flat Roof
Plan l
a
g
b
Catchment area B f
Catchment Area B = a x b (m²) All linear dimensions in metres.
Catchment area A Figure 3. Dual Pitch Flat Roof Catchment Area A = (f x l) + (g/2 x l) (m²) = l(f + g/2) (m²)
6
Catchment area C
All linear dimensions in metres.
c
d e Catchment area D For a flat roof with a dual pitch, split the roof up into discrete areas to isolate the catchment areas as follows: Catchment Area C = c x d (m²) Catchment Area D = c x e (m²) All linear dimensions in metres.
Watertight Rainwater Outlets
Design considerations Effective catchment area of roofs
Adjacent vertical surfaces
Practical design tips
Flat roofs or paved areas that are adjacent to
Similarly, for a flat roof exposed to two or
When designing an engineered rainwater
vertical walls and/or glazed surfaces will be
more vertical walls forming an angle or bay,
scheme, the following design hints are
subjected to an increased hydraulic load due
the assumed resulting wind direction requires
suggested:
to the effects of wind driven rain against these
that the combined areas of the walls should
vertical surfaces and subsequently running off
be considered together as follows:
Do not design for the maximum outlet
onto the roof.
hydraulic capacity, allow a 10% factor of
For a flat roof exposed to a single wall as shown in Figure 4, assume the effective
safety margin for intense storms and
a Catchment area F
Catchment area E
leaf/debris blockage. Always allow for a back-up outlet, even
catchment area to be half the exposed vertical
though only one outlet may be required.
area of the wall and is shown as follows:
Rainwater outlets should be inspected and cleaned at least every 6 months to ensure
Catchment area E a
reliable and continuous operation. h
H
H b Catchment area B Figure 5 Monopitch Flat Roof with Two Adjacent Vertical Walls
Roof Catchment Area B = a x b (m²) Vertical Wall Catchment Area E = a x H/2 (m²) b Catchment area B Figure 4. Monopitch Flat Roof with
Vertical Wall Catchment Area F = b x h/2 (m²) Total Catchment Area = (a x b) + ½√ (E²+ F² - 2F x Cos θ) (m²)
7
One Adjacent Vertical Wall All linear dimensions in metres; angles in From Figure 2, Catchment Area B = a x b (m²) Vertical Wall Catchment Area E = a x H/2 (m²) Total Catchment Area = (a x b) + (a x H/2) (m²) All linear dimensions in metres.
degrees.
Watertight Rainwater Outlets
Product ranges Index to HP product ranges
Introduction
Description
The extensive range of products included in
The ACO Building Drainage HP range of
the ACO Building Drainage HP (High
rainwater outlets provides a comprehensive
Performance) range of outlets provides
selection of high performance rainwater outlet
rainwater drainage solutions for a wide range
solutions for most domestic, industrial and
of applications.
commercial applications involving flat roofs, balconies and terracing.
Key features of this high quality product range include advanced grating geometry increasing the flow of water through the outlet compared Introduction
8
to conventional units and secure gratings to
Description
8
prevent vandalising and theft.
Product features
9
HP range accessories overview
8
9
The ACO Building Drainage HP range provides
HP vertical spigot oulet - dome grate
11
a high performance, cost effective, high
HP vertical spigot outlet - flat grate
12
quality solution for most rainwater
HP vertical screw outlet - dome grate
13
applications.
HP 45째 spigot outlet - dome grate
14
HP 90째 spigot outlet - dome grate
15
A wide range of outlet sizes and
HP balcony spigot outlet - flat grate
16
configurations are available: 50mm, 75mm,
HP two-way screw outlet - flat grate
17
100mm and 150mm.
HP gully spigot outlet - dome grate
18
HP refurbishment outlet - dome grate
19
HP range accessories selector
20
Watertight Rainwater Outlets
Product ranges Product features
HP range accessories overview
High flow rate Advanced design features encourage a higher flow rate of water through the outlet compared to conventional systems by reducing the amount of air that is drawn into
A wide range of accessories are available for the ACO Building Drainage HP range including raising rings, PVC connectors, terrace grates and deck support plates. See Pages 20-22 for details.
the outlet. If allowed to go unchecked, a vortex will form as the water enters the outlet - the same effect can be seen in the bath or a sink when the plug is removed. Cost effective drainage solution - high flow rates minimises number of outlets
Reduced installation costs
required.
Compared to conventional outlets, high
Secure grating to prevent vandalism and theft. Comprehensive product range for most applications.
performance outlets mean either fewer outlets/pipe/groundworks with reduced
Pipe connections
installation costs, or greater security in
Refer to Appendix 3 for details of the full
extreme rainfall conditions.
range of flexible pipe connection couplings
Durable, corrosion resistant construction. Gun-metal optionally available.
that are available from ACO Building Drainage. Secure gratings All gratings for the HP range of products
At the centre of the vortex, a void is naturally
are secured with stainless steel fixings that
formed as the water spirals through the outlet.
require either a socket wrench or spanner
Under these conditions, both water and air
for removal and replacement. This provides
are drawn into the outlet significantly reducing
additional security to prevent theft or
efficiency. For maximum flow rate efficiency,
vandalism.
only water should enter the outlet. This may result in the use of fewer outlets for a given
Membrane clamp
installation.
The roof membrane is positively secured into
Options
the outlet body by a clamp and is secured by
Gun-metal to BS 1400 available to special
2 stainless steel fixings. The membrane clamp
order. Gun-metal should be specified for
is serrated on the underside for improved
use in conjunction with copper or lead-
membrane clamp grip performance. The
clad roofs or when connected to copper
outlet design ensures the integrity of the seal
pipes. Refer to Appendix 1 for further
between the clamp and body is not disturbed
information. Suffix Sales Code with ‘GM’
when the grating is removed for maintenance during the life of the installation. The ACO Building Drainage HP range of outlets provide anti-vortex design features to minimise this effect and a twofold design approach is adopted to achieve this. On all circular domed gratings an inverted cup
for this option for example, 2HP-D GM. Gratings and clamp rings can be provided to suit corporate colour schemes and
Materials
coding as required.
All products are manufactured from LM6 grade aluminium alloy to BS 1490 as standard for optimum corrosion resistance.
arrangement is integrated within the grating to breakdown the vortex effect within the grating and in addition, the leaf guard geometry of the gratings is optimised to encourage water to flow radially into the outlet, thereby minimising the vortex effect
For further details of any options, contact
outside of the grating.
the ACO Building Drainage Sales Desk on 01462 816666 for more information.
9
Watertight Rainwater Outlets
Product ranges HP product selector
HP vertical spigot outlet
HP 45° & 90° spigot outlets
HP gully spigot outlet
General purpose rainwater outlets suitable for
These angled problem solving units are
The gully outlet is designed to fit into valley
direct connection to cast iron pipework to BS
particularly relevant to suit more complex pipe
gutters and is supplied with a vertical spigot
416 : 1983/EN 877 or to PVC ‘O’-ring socket
run detail. Pipework connections as per
outlet and dome grating. Pipework
pipe to BS 4514 : 1983. Other connections
vertical spigot details.
connections as per vertical spigot details.
HP balcony spigot outlet
HP refurbishment outlet
The balcony outlet provides discrete safe
When an existing flat roof is being upgraded,
drainage for balconies and walkways.
the refurbishment outlet is designed to fit
Supplied complete with a D-shaped flat
inside the existing outlet and pipework with
grating, the outlet can be installed against a
minimal disruption without the need to
wall. The grating is supplied with holes to
remove the original outlet. The aluminium
receive either 50mm, 75mm or 100mm
body incorporates a wide fixing flange to
nominal bore rainwater downpipes. These are
enhance the bond with roofing membranes
easily cut on site to suit the application.
and does not suffer the distortion effects
can be made using ACO Building Drainage flexible couplings or heat shrink sleeving.
Vertical spigot outlets are available with either domed or flat gratings. Flat gratings are used where either vehicles or pedestrian traffic is likely.
HP vertical screw outlet
10 Screwed outlets are recommended where connection to the outlet occurs within the thickness of the slab and threaded connections will form a completely gas-tight seal.
during the application of torched membranes. HP two-way screw outlet
Outlets are supplied with a flexible finned pipe seal ensuring a watertight connection to
Vertical screw outlets have a female parallel
existing pipework. The ease of use and
thread to BS 21 : 1985 for connecting
minimal disruption to the existing rainwater
directly to tubes conforming to BS 1387 :
system makes this an extremely cost effective
1985 which is supplied with a taper male
solution when upgrading flat roofs.
thread. This ensures a completely watertight seal when screwed fully home into the outlet body. A range of PVC adaptors are available from ACO Building Drainage to allow
The two-way outlet is designed to be used at
connection to aluminium pipework, socketed
the junction of roofs and parapet walls, or
and socketless cast iron pipework and PVC
wherever a horizontal and vertical surface
pipework.
meet. Available to fit pipe sizes of 50mm, 75mm and 100mm. This flexible design of outlet allows either horizontal or vertical outflow take-off. Pipework connections as per vertical screw details.
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP vertical spigot outlet - dome grate Product Code
Nominal Bore Pipe Size (mm)
Flow Rate† (l/s)
Part Number
Weight (kg)
Area Drained‡ (m2)
2HP-D
50
17001
1.7
81
2.39
3HP-D
75
17004
5.0
240
2.49
4HP-D
100
17007
10.7
514
4.23
6HP-D
150
17010
14.1
675
4.67
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
Physical dimensions A B Membrane
C D
E
Dimension
2HP-D
3HP-D
4HP-D
6HP-D
A
292
292
380
380
B
233
233
305
305
C
196
196
244
244
D
98
108
122
145
E
60
83
110
160
All dimensions in mm
Pipework connections
Specification clause
Vertical spigot outlets may be directly
The rainwater outlets 2HP-D/3HP-D/ 4HP-
All components used within the scope of this
connected to the following:
D/6HP-D* are to be ACO Building Drainage
system are shown on Drawing No. * and all
Cast iron pipework to BS 416:1973
HP vertical spigot outlets with locked dome
work shall be carried out strictly in
grating supplied by ACO Building Drainage
accordance with the manufacturers
(a division of ACO Technologies plc),
instructions and the installation details are
or EN 877. PVC ‘O’-ring socketed pipe to BS 4514 : 1985 (for 3HP-D, 4HP-D and 6HP-D outlets only). Connection to 2HP-D units via heat shrink socket or pipe couplings.
ACO Business Centre, Caxton Road,
set out on Drawing No. *.
Bedford, Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
All components to be manufactured from grade LM6 aluminium alloy to BS 1490/gun-metal to BS EN 1982*.
11
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP vertical spigot outlet - flat grate Product Code
Nominal Bore Pipe Size (mm)
Area Drained‡ (m2)
Flow Rate† (l/s)
Part Number
Weight (kg)
2HP-F
50
17002
1.7
81
2.51
3HP-F
75
17005
5.0
240
2.65
4HP-F
100
17008
10.7
514
4.08
6HP-F
150
17011
15.6
749
4.39
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
Physical dimensions
A B
Membrane
C D
E
12
Dimension
2HP-F
3HP-F
4HP-F
6HP-F 380
A
292
292
380
B
233
233
305
305
C
196
196
244
244
D
98
108
122
145
E
60
83
110
160
All dimensions in mm
Pipework connections
Specification clause
Vertical spigot outlets may be directly
The rainwater outlets 2HP-F/3HP-F/ 4HP-
All components used within the scope of this
connected to the following:
F/6HP-F* are to be ACO Building Drainage HP
system are shown on Drawing No. * and all
Cast iron pipework to BS 416:1973
vertical spigot outlets with locked flat grating
work shall be carried out strictly in
supplied by ACO Building Drainage (a division
accordance with the manufacturers
of ACO Technologies plc), ACO Business
instructions and the installation details are
or EN 877. PVC ‘O’-ring socketed pipe to BS 4514 : 1985 (for 3HP-F, 4HP-F and 6HP-F outlets only). Connection to 2HP-F units via heat shrink socket or pipe couplings.
Centre, Caxton Road, Bedford,
set out on Drawing No. *.
Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
All components to be manufactured from grade LM6 aluminium alloy to BS 1490/gun-metal to BS EN 1982*.
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP vertical screw outlet - dome grate Nominal Bore Pipe Size (mm)
Part Number
2HP-TD
50
17003
3HP-TD
75
17006
4HP-TD
100
6HP-TD
150
Product Code
Area Drained‡ (m2)
Weight (kg)
1.7
81
2.29
5.0
240
2.32
17009
10.7
514
4.03
17012
13.5
648
4.13
Flow Rate† (l/s)
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
Physical dimensions
A B Membrane
C
D
Dimension
2HP-TD
3HP-TD
4HP-TD
6HP-TD
A
292
292
380
380
B
234
234
305
305
C
121
121
133
144
D
35
45
38
38
All dimensions in mm
Pipework connections
Specification clause
Vertical screw outlets have a female parallel
The rainwater outlets 2HP-TD/3HP-TD/ 4HP-
All components used within the scope of this
thread to BS 21 : 1985 for connecting
TD/6HP-TD* are to be ACO Building Drainage
system are shown on Drawing No. * and all
directly to tube conforming to BS 1387 :
HP vertical screw outlets with locked dome
work shall be carried out strictly in
1985 which is supplied with a taper male
grating supplied by ACO Building Drainage
accordance with the manufacturers
thread. This ensures a completely watertight
(a division of ACO Technologies plc),
instructions and the installation details are
seal when screwed fully home into the outlet
ACO Business Centre, Caxton Road,
set out on Drawing No. *.
body.
Bedford, Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
Screwed outlets are recommended where
All components to be manufactured
connection to the outlet occurs within the
from grade LM6 aluminium alloy to
thickness of the slab and threaded
BS 1490/gun-metal to BS EN 1982*.
connections will form a completely gas-tight seal within the slab. Refer to HP Accessories section for details of ABS adaptors that are available from ACO Building Drainage.
13
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP 45° spigot outlet - dome grate Nominal Bore Pipe Size (mm)
Part Number
245HP-D
50
17013
1.7
81
3.34
345HP-D
75
17014
5.0
240
3.77
445HP-D
100
17015
10.7
514
4.81
Product Code
Weight (kg)
Area Drained‡ (m2)
Flow Rate† (l/s)
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
Physical dimensions
A B Membrane
C
E
Dimension
14
245HP-D
D
345HP-D
445HP-D
A
305
305
372
B
229
229
305
C
229
235
273
D
175
175
191
E
62
87
114
All dimensions in mm
Pipework connections
Specification clause
45° spigot outlets may be directly connected
The rainwater outlets 245HP-D/345HP-D/
All components used within the scope of this
to the following:
445HP-D* are to be ACO Building Drainage
system are shown on Drawing No. * and all
Cast iron pipework to BS 416:1973
HP 45° spigot outlets with locked dome
work shall be carried out strictly in
grating supplied by ACO Building Drainage
accordance with the manufacturers
(a division of ACO Technologies plc),
instructions and the installation details are
or EN 877. Connection to PVC pipework via heat shrink socket or pipe couplings.
ACO Business Centre, Caxton Road,
set out on Drawing No. *.
Bedford, Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
All components to be manufactured from grade LM6 aluminium alloy to BS 1490/gun-metal to BS EN 1982*.
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP 90° spigot outlet - dome grate Product Code
Nominal Bore Pipe Size (mm)
Part Number
290HP-D
50
17016
1.7
81
3.57
390HP-D
75
17017
3.3
171
3.61
490HP-D
100
17018
7.2
336
4.69
Weight (kg)
Area Drained‡ (m2)
Flow Rate† (l/s)
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
Physical dimensions
A B
Membrane
C
E
D
Dimension
290HP-D
390HP-D
490HP-D
A
305
329
405
B
229
229
305
C
124
121
142
D
232
267
285
E
62
83
110
All dimensions in mm
Pipework connections
Specification clause
90° spigot outlets may be directly connected
The rainwater outlets 290HP-D/390HP-D/
All components used within the scope of this
to the following:
490HP-D* are to be ACO Building Drainage
system are shown on Drawing No. * and all
Cast iron pipework to BS 416:1973 or EN
HP 90° spigot outlets with locked dome
work shall be carried out strictly in
grating supplied by ACO Building Drainage
accordance with the manufacturers
(a division of ACO Technologies plc),
instructions and the installation details are
877. PVC ‘O’-ring socketed pipe to BS 4514 : 1985 (for 390HP-D and 490HP-D outlets only). Connection to 290HP-D via heat shrink socket or pipe couplings.
ACO Business Centre, Caxton Road,
set out on Drawing No. *.
Bedford, Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
All components to be manufactured from grade LM6 aluminium alloy to BS 1490/gun-metal to BS EN 1982*.
15
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP balcony spigot outlet - flat grate Product Code
Nominal Bore Pipe Size (mm)
Weight (kg)
Area Drained‡ (m2)
Flow Rate† (l/s)
Part Number
2HP-BO
50
17019
1.7
81
2.58
3HP-BO
75
17020
5.0
240
2.71
4HP-BO
100
17021
8.4
403
2.77
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
Physical dimensions A
242
B
Membrane
C E D G F
Dimension
16
2HP-BO
3HP-BO
186
4HP-BO
A
270
270
270
B
205
205
205
C
52
52
52
D
125
125
125
E
235
235
235
F
180
180
180
G
60
83
110
All dimensions in mm
Pipework connections
Specification clause
Balcony outlets may be directly connected to
The rainwater outlets 2HP-BO/3HP-BO/
All components used within the scope of this
the following:
4HP-BO* are to be ACO Building Drainage HP
system are shown on Drawing No. * and all
Cast iron pipework to BS 416:1973 or
Balcony spigot outlets with locked flat grating
work shall be carried out strictly in
supplied by ACO Building Drainage (a division
accordance with the manufacturers
of ACO Technologies plc), ACO Business
instructions and the installation details are
EN 877. PVC ‘O’-ring socketed pipe to BS 4514 : 1985 (for 3HP-BO and 4HP-BO outlets only). Connection to 2HP-BO units via heat shrink socket or pipe couplings.
Centre, Caxton Road, Bedford,
set out on Drawing No. *.
Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
All components to be manufactured from grade LM6 aluminium alloy to BS 1490/gun-metal to BS EN 1982*.
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP two-way screw outlet - flat grate Area Drained‡ (m2)
Flow Rate† (l/s) Product Code
Nominal Bore Pipe Size (mm)
Part Number
Vertical Outflow
Horizontal Outflow
2HP-2W
50
17022
1.7
1.7
81
81
2.14
3HP-2W
75
17023
3.9
1.5
189
93
2.22
4HP-2W
100
17024
6.0
2.0
288
110
2.23
Vertical Outflow
Weight (kg)
Horizontal Outflow
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
Physical dimensions E
Membrane
A
D
F B
C
Dimension
2HP-2W
3HP-2W
4HP-2W
204
A
204
204
B
70
70
70
C
191
191
191
D
214
214
214
E
50
50
50
F
45°
45°
45°
Overall Length
225
225
225
All dimensions in mm
Pipework connections
Specification clause
Two Way outlets have a female parallel thread
The rainwater outlets 2HP-2W/3HP-2W/
All components used within the scope of this
to BS 21 : 1985 for connecting directly to
4HP-2W* are to be ACO Building Drainage
system are shown on Drawing No. * and all
tube conforming to BS 1387 : 1985 which is
HP Two-Way screw outlets with locked flat
work shall be carried out strictly in
supplied with a taper male thread. This
grating supplied by ACO Building Drainage
accordance with the manufacturers
ensures a completely watertight seal when
(a division of ACO Technologies plc),
instructions and the installation details are
screwed fully home into the outlet body.
ACO Business Centre, Caxton Road,
set out on Drawing No. *.
Screwed outlets are recommended where
Bedford, Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
connection to the outlet occurs within the
All components to be manufactured
thickness of the slab and threaded
from grade LM6 aluminium alloy to
connections will form a completely gas-tight
BS 1490/gun-metal to BS EN 1982*.
seal within the slab. Refer to HP Accessories section for details of ABS adaptors that are available from ACO Building Drainage.
17
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP gully spigot outlet - dome grate Nominal Bore Pipe Size (mm)
Product Code
Weight (kg)
Area Drained‡ (m2)
Flow Rate† (l/s)
Part Number
3HP-GO
75
17025
5.0
240
3.89
4HP-GO
100
17026
10.4
500
4.02
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
A
Physical dimensions
B Membrane
C D
E
3HP-GO
Dimension
18
4HP-GO
A
228
228
B
188
188
C
251
251
D
130
130
E
83
110
Overall Length
334
334
All dimensions in mm
Pipework connections
Specification clause
Gully outlets may be directly connected to the
The rainwater outlets 3HP-GO/4HP-GO* are
All components used within the scope of this
following:
to be ACO Building Drainage HP Gully outlets
system are shown on Drawing No. * and all
Cast iron pipework to BS 416:1973 or
with locked dome grating supplied by ACO
work shall be carried out strictly in
Building Drainage (a division of ACO
accordance with the manufacturers
Technologies plc), ACO Business Centre,
instructions and the installation details are
EN 877. PVC ‘O’-ring socketed pipe to BS 4514 : 1985.
Caxton Road, Bedford, Bedfordshire
set out on Drawing No. *.
MK41 0LF.
* please delete or complete as appropriate.
All components to be manufactured from grade LM6 aluminium alloy to BS 1490/gun-metal to BS EN 1982*.
Watertight Rainwater Outlets
Product ranges Technical information and order data
HP refurbishment outlet - dome grate Nominal Bore Pipe Size (mm)
Product Code
Flow Rate† (l/s)
Part Number
Weight (kg)
Area Drained‡ (m2)
3HP-RFO
75
17027
5.0
240
5.00
4HP-RFO
100
17028
5.0
240
5.10
† Based on a 35mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75mm/hr. Flow rates based on BS EN 12056 : 2000.
A Physical dimensions
B Membrane
C D
E F G
Dimension
3HP-RFO
4HP-RFO
A
456
456
B
304
304
C
346
346
D
266
266
E
63.5
88.9
F
95
120
G
205
205
All dimensions in mm
Pipework connections
Specification clause
Refurbishment outlets are designed to fit the
The rainwater outlets 3HP-RFO/4HP-RFO*
All components used within the scope of this
following range of existing pipework systems:
are to be ACO Building Drainage HP
system are shown on Drawing No. * and all
3HP-RFO : 71.5 to 78.5mm internal pipe
Refurbishment outlets with locked dome
work shall be carried out strictly in
grating supplied by ACO Building Drainage
accordance with the manufacturers
(a division of ACO Technologies plc),
instructions and the installation details are
diameter. 4HP-RFO : 97.0 to 104.0mm internal pipe diameter.
ACO Business Centre, Caxton Road,
set out on Drawing No. *.
Bedford, Bedfordshire MK41 0LF.
* please delete or complete as appropriate.
All components to be manufactured from grade LM6 aluminium alloy to BS 1490/gun-metal to BS EN 1982*.
19
Watertight Rainwater Outlets
Product ranges HP range accessories selector PVC adaptors
Terrace grates
raise the level of the dome grating above the
PVC adaptors are available for threaded
Terrace grates are designed for installations
outlet body, for example an inverted roof
outlets - HP Vertical Screw (HP-TD); and HP
with terraced paving slabs or block paviors.
construction. With the exception of the
Two-Way (HP-2W) systems. ABS adaptors
Terrace grates can only be used with circular
Balcony Outlets (HP-BO) and Gully Outlets
provide a quick and convenient connection to
raising rings as described above. A slotted
(HP-GO), raising rings will only accept dome
PVC and cast iron pipework.
fixing detail allows 90° rotational movement
A wide range of accessories is available for the ACO Building Drainage HP range of rainwater outlets allowing easy installation in common and not so common applications of roof construction, including warm and inverted roofs, terraces and concealed outlets under raised paving slabs.
Raising rings Raising rings are used where it is necessary to
gratings or Terrace Grates as the raising rings will not accept the standard flat grates.
to accommodate slab/pavior patterns. The adaptors are suitable for connection to all types of pipe systems including cast iron socketed or socketless systems and are assembled using PTFE tape to ensure a watertight connection. Manufactured from tough ABS, the adaptors are supplied with a male thread and chamfered spigot for easy connection to PVC pipes. ABS adaptors are suitable for direct connection to:
Cast Iron pipework to BS 416:1973 Raising rings are easily cut with a hacksaw on site if required to match installation
20
requirements, i.e. to suit paving slabs.
or EN 877. PVC O-ring socketed pipe to BS 4514:1983.
Stainless steel extension fixings are supplied with each raising ring.
Deck supports
Raising rings are also available for Balcony Outlets and Gully Outlets. All raising rings are manufactured from LM6 aluminium alloy to BS 1490 and are optionally available in gun metal to BS 1400. Suffix sales code with ‘GM’ for this option.
Deck supports are used where ACO Building Drainage HP rainwater outlets are installed in metal deck roof constructions, providing a stable and secure interface between the outlet and roof. Deck Supports are manufactured from 1.5mm steel sheet and finished primed in a red oxide paint finish. Suitable for all types of metal deck roofing.
Watertight Rainwater Outlets
Product ranges Raising rings and adaptors A
B
Raising rings for circular outlets Vertical Spigot, Vertical Screw, 45° Spigot, 90° Spigot C
and Refurbishment Outlets (dome grate only) Outlet Model
Product Code
Part Number
A
B
C
Weight (kg)
2/3RR
17029
161
128
150
0.72
4/6RR
17030
233
128
222
1.14
2HP-D; 2HP-TD; 3HP-D; 3HP-TD; 245HP-D; 345HP-D; 290HP-D; 390HP-D; 3HP-RFO 4HP-D; 4HP-TD; 6HP-D; 6HP-TD; 445HP-D; 490HP-D; 4HP-RFO All dimensions in mm.
A
B Raising rings for balcony outlets Part Number
Product Code BO-RR
17031
A
B
Weight (kg)
220
115
1.25
All dimensions in mm.
A
B
21
Raising rings for gully outlets Part Number
Product Code GO-RR
17032
A
B
240
115
Weight (kg) 1.85
All dimensions in mm.
L I
B
ABS adaptors
Male thread A
Product Code
Part Number
Male Thread Ø A (BSP)
2STC
15007
2”
3STC
15008
3”
82.0
305
148
0.55
4STC
15009
4”
110.5
305
148
1.12
6STC
15010
6”
160.0
305
148
2.25
Material: ABS.
Outside Ø B (mm) 57.0
Length L (mm)
Length l (mm)
Weight (kg)
305
148
0.33
Watertight Rainwater Outlets
Product ranges Deck support and terrace gratings
Deck supports for circular outlets
Outlet Model
Part No’s
Weight (kg)
Product Code
2HP-D
17033
1.97
2/3DS
Sales Code: 2/3DS 335
2HP-TD 3HP-D 335
3HP-TD 245HP-D 345HP-D 290HP-D 390HP-D 4HP-D
17034
2.91
4/6DS
Sales Code: 4/6DS
4HP-TD
415
6HP-D 6HP-TD 445HP-D 415
490HP-D 3HP-RFO 4HP-RFO All dimensions in mm.
Terrace gratings for circular outlet raising rings
Outlet Model
Part Number
Weight (kg)
Product Code
Appropriate Raising Ring Sales Code (Ref.)
2HP-D
17035
0.70
2/3TG
2/3RR
22
Sales Code: 2/3 TG 160
2HP-TD 3HP-D 3HP-TD 245HP-D
25
345HP-D 290HP-D 390HP-D 4HP-D 4HP-TD
17036
1.52
4/6TG
4/6RR
Sales Code: 4/6TG 232
6HP-D 6HP-TD 445HP-D 490HP-D 3HP-RFO 4HP-RFO All dimensions in mm.
25
Watertight Rainwater Outlets
Appendices Index to appendices
Appendix 1 - material selection Overview
24
Aluminium alloys
24
Gun-metal
24
Galvanised mild steel
24
Galvanic corrosion
24
The electromotive series
24
Material selection tips
24
Appendix 2 - typical roof construction detail Warm roof
25
Inverted roof
25
Un-insulated roof
25
HP 90째 outlet
26
Gully outlet
26
Refurbishment outlet
26
Balcony outlet with downpipe
27
Two-way outlet
27
Terrace grate
28
Metal deck support
28
Appendix 3 - installation guidelines General installation notes
29
Threaded outlets
29
Balcony outlets
29
HP circular raising rings
29
Balcony/gully outlet raising rings
29
Deck supports
29
Refurbishment outlet
30
23
Watertight Rainwater Outlets
Appendices Appendix 1 - material selection
Overview
Gun-metal
The electromotive series
This section includes a brief insight into the
Gun metal possesses good tensile strength
The susceptibility of different metals to
materials that the rainwater drainage products
and corrosion resistant properties and is used
corrosion whilst in contact with each other
featured in this Product Catalogue and Design
in many bearing and marine applications.
depends upon the difference between the
Guide are manufactured from.
ACO Building Drainage rainwater outlets are
contact potentials. The greater the potential
available in gun-metal when bi-metallic
difference, the greater the tendency for
corrosion resistance arising from lead or
corrosion. The metal with the higher negative
copper materials is a potential risk.
potential forms the anode and is corroded
In certain applications, it is vital to understand the long term operational effects that will occur if products are not specified accurately or installed correctly.
Aluminium alloys
Gun-metal is an alloy of copper, tin and zinc. Admiralty gun-metal typically has a
Some examples from the Electromotive Series
composition of 88% copper, 10% tin and
are shown opposite for illustration.
2% zinc. More noble decreased corrosion
Aluminium alloys are very common and can be found in a wide range of applications ranging from cooking utensils to spacecraft.
preferentially.
Titanium 304 Stainless Steel (passivated)
Galvanised mild steel
Silver
The material is commercially available in
Mild steel is a convenient, ductile, easily
excess of 99% purity and is used primarily for
worked and cost effective material that finds
Copper
its high resistance to corrosion, lightness and
many uses in everyday applications around
Gun-metal
strength.
us.
Nickel
Lead Cast Iron
Comparing similar products, aluminium alloys
In its raw state, mild steel offers no resistance
weigh around one-third as much as equivalent
to corrosion and quickly forms a familiar rust
mild steel and stainless steel products and
(ferric oxide) on its surface unless precautions
compared to mild steel, they have a much
are taken to prevent oxidation taking place.
better corrosion resistance to atmospheric conditions.
24
Galvanising is a process that is commonly
Aluminium Less noble increased corrosion
Zinc Magnesium
Material selection tips
used to prevent corrosion and essentially For applications when dissimilar materials
Because aluminium alloys are strong,
consists of a layer of zinc applied to the
lightweight, have good corrosion resistance,
surface of the steel. ACO Building Drainage
are in contact with each other wherever
are cost effective and have excellent casting
use a ‘hot dip’ process of dipping the
possible, select materials to be as close as
properties, this material is an obvious first
component into a vat of molten zinc.
possible to each other in the Electromotive Series. For example, if a roof is copper
choice for rainwater outlets and floor gullies.
clad, select a gun-metal outlet as gun-
Additionally, being non-magnetic, aluminium will not attract ferrous particles that could otherwise cause silt traps and long term maintenance issues.
Galvanic corrosion Galvanic corrosion occurs when two dissimilar metals are in electrical contact and connected
metal is around 88% copper, this closely matches the cladding material. Where dissimilar metals cannot be readily
ACO Building Drainage aluminium rainwater
by an electrolyte. An electrolyte conducts
avoided, care must be taken to electrically
outlets, shower drains and floor drains use
electricity and can be water solutions
insulate the adjacent materials. For
LM6 grade aluminium alloy to BS 1490. LM6
containing salts or acids - and need not be
example where lead is dressed into an
exhibits excellent resistance to corrosion in
concentrated for the effect to take place.
aluminium alloy outlet, carefully paint the
both atmospheric and marine environments compared to other aluminium alloys, and is resistant to sulphate attack for curing concrete. When exposed to the atmosphere, a thin invisible aluminium oxide film forms on the surface of the material that protects the material from further oxidation.
aluminium body and clamp components The effects of galvanic corrosion begin to play
with good quality bitumen paint or use an
an important part when an aluminium
insulating gasket material such as
rainwater outlet is used in conjunction with
neoprene sponge. Ideally, a gun-metal
metallic membranes, such as lead or copper.
outlet should be used in conjunction with
The Electromotive Series provides an insight to the corrosion effects between dissimilar materials.
lead clad roofs. The effects of galvanic corrosion can be accelerated in saline environments. Caution should be observed with rainwater outlet applications close to coastal regions.
Watertight Rainwater Outlets
Appendices Appendix 2 - typical roof construction detail
Warm roof A warm roof is where the main mass of the
Reflective layer of chippings
Clamping Raising Ring Ring
Secure bolted Rigid insulation grating board
roof structure lies below the main thermal insulation. The waterproof membrane is positioned above the insulation.
Vapour Barrier
Gravel ballast
Two layer Outlet mastic asphalt body
Clamping Raising ring ring
Structural deck
Secure bolted grating
Sand/cement screed to falls
Rigid insulation board
Inverted roof An inverted roof is a form of warm roof where the main mass of the roof structure lies below the main thermal insulation, however, the waterproof membrane lies beneath the thermal insulation.
25 wo layer mastic asphalt n isolating membrane
Outlet body
Clamping ring
Structural deck
Sand/cement screed to falls
Secure bolted grating
Un-insulated roof A roof without thermal insulation. This type of construction is only permitted in nonhabitable buildings, e.g. garages.
Two layer mastic asphalt on isolating membrane
Outlet body
In situ cast concrete deck
Watertight Rainwater Outlets
Appendices Appendix 2 - typical roof construction detail
HP 90째 outlet
Three layer built up Clamping felt roofing ring
Insulation
Secure bolted grating
Timber joist
Outlet body
Gunmetal clamping ring
Gully outlet
Plywood deck
Gunmetal domical grate
Firring piece
Vapour barrier Plaster ceiling
Sheet lead gutter lining
Rigid insulation board
Timber spaces Gunmetal in insulated gutter body
Ply base
Rigid Timber insulation gutter board
26
Refurbishment outlet
Two layer high performance felt layered onto vapour barrier
Vapour barrier
Secure bolted grating
PU insulation port
Clamping Timber ring frame
PU expanded foam insulation
Rigid insulation board
Structural deck
Pipe seal Existing rainwater pipe
Watertight Rainwater Outlets
Appendices Appendix 2 - typical roof construction detail
Balcony outlet with downpipe
Clamping ring
Flat grating with pipe cut-out
Outlet body
Two layer mastic asphalt on isolating membrane
Structural deck
Sand/cement screed to falls
Two-way outlet 27
Grating Screw thread connector
Clamping ring
Structural deck
Reflective chippings on three layer built up felt roofing
Vapour barrier
Rigid insulation board
Watertight Rainwater Outlets
Appendices Appendix 2 - typical roof construction detail
Terrace grate
Rigid insulation board
Paving slabs ballasting
Structural deck
Outlet body
Raising ring
Terrace grate
Clamping ring
Paving slab support
Sand/cement Two layer screed to falls mastic asphalt
Metal deck support 28 Three layer felt
Timber fillet
Metal closure panel
Metal deck
Secure bolted Clamping ring grating
Screwed outlet body
Rigid insulation board with integral vapour barrier to falls
Deck support
Watertight Rainwater Outlets
Appendices Appendix 3 - installation guidelines
General installation notes
Threaded outlets
HP circular raising rings
All outlets must be securely attached to the
For all ACO Building Drainage threaded
HP raising rings can be used for domed
roof structure using a suitable timber frame or
outlets (HP Vertical Screw and Two-Way
grating outlets and terrace gratings only. HP
deck support. The waterproof membrane must
outlets) are provided with female parallel
raising rings cannot be used with flat gratings.
be fully dressed into the outlet body and
threads conforming to BS 21:1985 for direct
securely clamped under the membrane clamp.
connection of threaded tube conforming to BS 1387:1985. This tube is supplied with a taper male thread conforming to BS 21:1985,
Practical design/installation tips Do not design for the maximum outlet
Where required, the HP raising rings may be easily cut on site to a specific height using a
safety margin for intense storms and
recommended where a connection to the
leaf/debris blockage.
outlet is made within the thickness of the
Rainwater outlets should be inspected and
raising ring product.
screwed into the unit. Threaded outlets are particularly
though only one outlet may be required.
steel fixings that are supplied with each
which ensures a watertight joint when fully
hydraulic capacity, allow a 10% factor of
Always allow for a back-up outlet, even
HP raising rings are secured with stainless
concrete slab. In these applications, the threaded connection creates a completely watertight seal.
hacksaw (for example, when using a terrace grate in conjunction with paving slabs).
Balcony/gully outlet raising rings Raising rings for balcony outlets and gully
cleaned at least every 6 months to ensure
Where an ABS screw thread connector (STC)
reliable and continuous operation.
is used in conjunction with threaded outlets, the screw thread connector should be assembled with PTFE tape to ensure a
outlets are available and perform a similar function as the HP Circular raising rings as previously described. Separate stainless steel fixings are supplied with each unit.
watertight seal.
Balcony outlets
Deck supports ACO deck supports are recommended for
The flat grating is configured with an array of eccentric grating slots that can be readily cut on site with a hacksaw to accommodate a downpipe.
metal decked roof construction and are suitable for installation on all types of metal decked roofs. Deck supports have pre-drilled holes for ease of fixing.
29
Watertight Rainwater Outlets
Appendices Appendix 3 - installation guidelines
Refurbishment outlet Refurbishment outlets are designed to
Step 1
Step 5
conveniently fit within the existing rainwater
Strip back all roof coverings to the deck level.
Flush with clean water to lubricate and insert
outlet of the roof that is being refurbished,
Clean out old outlet with wire brush and flush
tail pipe into existing pipework. Seat flange on
which means there is no need to remove the
with clean water.
timber frame.
existing rainwater outlet.
Refurbishment outlets incorporate a high performance domed grating and optimised tail pipe to maximise flow through the unit. The labyrinth finned seal ensures a watertight connection to the existing pipework. Two sealable access points within the body enable PU foam to be injected to fill
Step 2
the void between the old and new outlet.
Form timber frame around old outlet and lay
Step 6
insulation board/vapour barrier (35mm
Screw flange to timber frame.
minimum) Membrane
Step 7
30
Step 3
Inject PU foam through one port for 5
Check clearance and trim tail pipe to length
seconds. Remove any surplus.
with hacksaw if necessary.
Step 8 Step 4
Blank off ports with captive screws. Complete
Push on flexible labyrinth seal.
installation and weatherproofing.
Watertight Rainwater Outlets
31
ACO Technologies plc
ACO Building Drainage ACO Water Management Civils + Infrastructure Urban + Landscape ACO Sport ACO Wildlife ACO Technic ACO Home & Garden
ACO Building Drainage A division of ACO Technologies plc ACO Business Centre Caxton Road Bedford Bedfordshire MK41 0LF Tel: 01462 816666 Fax: 01462 851490 e-mail: buildingdrainage@aco.co.uk www.acobuildingdrainage.co.uk
The ACO Group: A strong family you can depend on.
Š November 2011 ACO Technologies plc. All reasonable care has been taken in compiling the information in this document. All recommendations and suggestions on the use of ACO products are made without guarantee since the conditions of use are beyond the control of the Company. It is the customer's responsibility to ensure that each product is fit for its intended purpose, and that the actual conditions of use are suitable. This brochure and any advice is provided by ACO Technologies plc (the Company) free of charge and accordingly on terms that no liability including liability for negligence will attach to the Company or its servants or agents arising out of or in connection with or in relation to this brochure or any such advice. Any goods supplied by the Company will be supplied solely upon its standard conditions of sale, copies of which are available on request. The Company's policy of continuous product development and improvement renders specifications liable to modification. Information provided in this brochure is therefore subject to change without prior notification.