/Roof%20Outlets%20Brochure by ACO Building Drainage

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ACO Building Drainage watertight rainwater outlets for flat roofs and other areas Product Catalogue and Specifiers Design Guide

Watertight Rainwater Outlets Product Catalogue

ACO Building Drainage Our built environment is becoming ever more complex. Applications are becoming more sophisticated and the increasing pressure of regulations and standards make achieving design, performance and financial goals ever tougher. ACO Building Drainage is a new concept within the ACO Group. Our mission: to eliminate design risk, to reduce installed and life cost and to deliver exceptional finish and performance in every product application. We achieve this through three factors:

High performance materials Design experience and project support Global manufacturing capacity

Our global resources and fabrication capacity make it possible for us to deliver best value, both with our standard products and with our bespoke designs. Confidence is further assured with quality systems that are in accordance with ISO 9001-2000. ACO Building Drainageâ&#x20AC;&#x2122;s extensive portfolio includes:

ACO Building Drainage is a division of ACO Technologies plc and part of the worldwide ACO Group. The Group has sales in excess of ÂŁ300 million worldwide with production facilities in the UK, Germany, France, Switzerland, Denmark, Spain, Poland, Czech Republic, Australia and the USA. In total more than 3000 people are employed in 30 countries throughout the world.

Stainless steel Modular Channel

Tel:

system

Stainless steel Shower Channel systems

Stainless steel EuroGully gully system Stainless steel and polymer composite access covers

Biological Grease Management system Gravity Grease Separator system Anti-flood protection valves Stainless steel socketed pipe system Galvanised steel socketed pipe system Rainwater outlets for flat roofs

01462 816666 Fax:

01462 851490 e-mail Enquiries:

buildingdrainage@aco.co.uk website:

www.acobuildingdrainage.co.uk

Introduction Flat Roofs

The Need for Rainwater Outlets

Contents

Over the past few years, there have been major advances and improvements in the materials used in modern roofing technology. The specifier now has renewed confidence to take full advantage of the benefits of a flat roof and low pitched roof design concept.

Any flat area needs careful design to ensure efficient removal of surface water. Traditionally, water from a flat roof or other structure is channelled by way of a slope to a rainwater pipe. Leaks can often occur at the junction of the membrane and the rainwater pipe.

Design Considerations

Flat roofs allow greater planning and design 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.

To overcome this potential problem, ACO Building Drainage rainwater outlets provide a watertight joint between the membrane and the outlet by mechanically clamping the membrane to the sump unit. Tried and tested for over 40 years, ACO Building Drainage outlets have been used successfully on all types of flat roof construction.

Extensive or irregular shaped buildings can be roofed more quickly, easily and cost effectively than a pitched roof.

Hydraulic Design Consideration

Effective Catchment Area of Roofs

Product Ranges Index To HP Ranges

HP (High Performance) Range

Appendices Index To Appendices

Appendix 1 Material Selection

Appendix 2 Typical Roof Construction 25

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.

Appendix 3 Installation Guidelines

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. HP (High Performance) range of outlets provides rainwater drainage solutions for a wide range of applications.

Watertight Rainwater Outlets Product Catalogue

Design Considerations HYDRAULIC DESIGN CONSIDERATIONS

Overview

Geographical Location

Flow Rate Calculation

The following notes are intended as a guide to the specifier who is designing a rainwater drainage system for a roof. It is recommended that reference is made to British Standard BS EN 12056 : 2000 Gravity Drainage Systems Inside Buildings - Part 3 : Roof drainage, layout and calculation for a comprehensive design guide.

Rainfall intensity has a direct impact on the performance requirements of any rainwater drainage system. For roofs and paved areas, it is normally impracticable to guard against very infrequent, extremely heavy rainfall situations and so the designer should aim to strike a balance between the cost of the drainage system, the risk category of the building and the frequency and subsequent consequences of flooding.

The flow rate Q, from roofs, paved areas and vertical walls and surfaces is calculated as follows and assumes that all surfaces are impermeable:

The drainage system for roofs and paved areas should be capable of coping with the intense rainfall that accompanies summer thunderstorms.

I = Rainfall intensity (75 mm/hr)

For any rainwater drainage system to work effectively and reliably, due account must be taken of the following considerations:

Geographical location Rainfall intensity Effective catchment area of roof Risk category of building Hydraulic capacity of the drainage system(s) employed

The UK experiences complex and varied rainfall patterns. For example, surprisingly, 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. A rainfall intensity of 75 mm/hr (0.02 l/s/ m2) is used throughout this design catalogue.

Q = A x I litres/second 3600 where Q = Volumetric flow rate (l/s) A = Effective catchment area (mÂ˛)

EFFECTIVE CATCHMENT AREA OF ROOFS

Pitched Roofs

Flat Roofs & Paved Areas

The effective catchment area of a freely exposed pitched roof draining to an eaves or parapet wall gutter is equal to the plan area of the roof plus half its maximum elevation area.

For a monopitch flat roof or paved area with a freely exposed horizontal surface, the effective catchment area is equal to the plan area of the area to be drained as shown below:

Figure 1. Pitched Roof

Figure 2. Monopitch Flat Roof

Plan l

Catchment area B

Catchment Area B = a x b (m²) All linear dimensions in metres.

Catchment area A Catchment Area A = (f x l) + (g/2 x l) (m²) = l(f + g/2) (m²) All linear dimensions in metres.

Figure 3. Dual Pitch Flat Roof Catchment area 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 Product Catalogue

EFFECTIVE CATCHMENT AREA OF ROOFS

Adjacent Vertical Surfaces Flat roofs or paved areas that are adjacent to vertical walls and/or glazed surfaces will be subjected to an increased hydraulic load due to the effects of wind driven rain against these vertical surfaces and subsequently running off onto the roof. For a flat roof exposed to a single wall as shown in Figure 4, assume the effective catchment area to be half the exposed vertical area of the wall and is shown as follows:

Similarly, for a flat roof exposed to two or more vertical walls forming an angle or bay, the assumed resulting wind direction requires that the combined areas of the walls should be considered together as follows: Figure 5 Monopitch Flat Roof with Two Adjacent Vertical Walls

Catchment area E

even though only one outlet may be required.

Rainwater outlets should be

Catchment area E h

H b Catchment area B

Roof Catchment Area B = a x b (m²) Vertical Wall Catchment Area E = a x H/2 (m²) Vertical Wall Catchment Area F = b x h/2 (m²) Total Catchment Area = (a x b) + ½√ (E²+ F² - 2F x Cos θ) (m²) All linear dimensions in metres; angles in degrees. b Catchment area B

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.

Do not design for the maximum

Always allow for a back-up outlet,

Figure 4. Monopitch Flat Roof with One Adjacent Vertical Wall

When designing an engineered rainwater scheme, the following design hints are suggested: outlet hydraulic capacity, allow a 10% factor of safety margin for intense storms and leaf/debris blockage.

a Catchment area F

Practical Design Tips

inspected and cleaned at least every 6 months to ensure reliable and continuous operation.

Product Ranges HP (High Performance) Range The extensive range of products included in the ACO Building Drainage HP (High Performance) range of outlets provides rainwater drainage solutions for a wide range of applications.

Index to HP Ranges Description

Product Features

HP Vertical Spigot Oulet - Dome Grate 11 HP Range Accessories

Key features of this high quality product range include advanced grating geometry increasing the flow of water through the outlet compared to conventional units and secure gratings to prevent vandalising and theft.

HP Range Product Selector

HP 45째 Spigot Outlet

The ACO Building Drainage HP range provides a high performance, cost effective, high quality solution for most rainwater applications.

HP 90째 Spigot Outlet

HP Balcony Spigot Outlet

HP Two-Way Screw Outlet

HP Gully Spigot Outlet

HP Refurbishment Outlet

HP Range Accessories

HP Vertical Spigot Outlet - Flat Grate 12 HP Vertical Screw Outlet

A wide range of outlet sizes and configurations are available: 50 mm, 75 mm, 100 mm and 150 mm.

Watertight Rainwater Outlets Product Catalogue

HP Range Reduced Installation Costs

Description

Compared to conventional outlets, high performance outlets mean either fewer outlets/pipe/groundworks with reduced installation costs, or greater security in extreme rainfall conditions.

The ACO Building Drainage HP range of rainwater outlets provides a comprehensive selection of high performance rainwater outlet solutions for most domestic, industrial and commercial applications involving flat roofs, balconies and terracing.

Secure Gratings

High Flow Rate

Product Features Cost effective drainage solution - high flow rates minimises number of outlets required.

Secure grating to prevent vandalism and theft.

Comprehensive product range for 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 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.

most applications.

Durable, corrosion resistant construction.

Gun-metal optionally available. At the centre of the vortex, a void is naturally formed as the water spirals through the outlet. Under these conditions, both water and air are drawn into the outlet significantly reducing efficiency. For maximum flow rate efficiency, only water should enter the outlet. This may result in the use of fewer outlets for a given 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 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 outside of the grating.

All gratings for the HP range of products are secured with stainless steel fixings that require either a socket wrench or spanner for removal and replacement. This provides additional security to prevent theft or vandalism. Membrane Clamp The roof membrane is positively secured into the outlet body by a clamp and is secured by 2 stainless steel fixings. The membrane clamp is serrated on the underside for improved membrane clamp grip performance. The outlet design ensures the integrity of the seal between the clamp and body is not disturbed when the grating is removed for maintenance during the life of the installation. Materials All products are manufactured from LM6 grade aluminium alloy to BS 1490 as standard for optimum corrosion resistance.

HP Range Accessories 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 16-22 for details.

Options

Gun-metal to BS 1400 available to special order. Gun-metal should be specified for use in conjunction with copper or lead-clad roofs or when connected to copper pipes. Refer to Appendix 1 for further information. Suffix Sales Code with â&#x20AC;&#x2DC;GMâ&#x20AC;&#x2122; for this option for example, 2HP-D GM.

Gratings and clamp rings can be provided to suit corporate colour schemes and coding as required.

Pipe Connections Refer to Appendix 4 for details of the full range of flexible pipe connection couplings that are available from ACO Building Drainage. For further details of any options, contact the ACO Building Drainage Sales Desk for more information.

Watertight Rainwater Outlets Product Catalogue

HP Range Product Selector HP Vertical Spigot Outlet

HP 45° & 90° Spigot Outlets

HP Gully Spigot Outlet

General purpose rainwater outlets suitable for direct connection to cast iron pipework to BS 416 : 1983/EN 877 or to PVC ‘O’-ring socket pipe to BS 4514 : 1983. Other connections 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.

These angled problem solving units are particularly relevant to suit more complex pipe run detail. Pipework connections as per vertical spigot details.

The gully outlet is designed to fit into valley gutters and is supplied with a vertical spigot outlet and dome grating. Pipework connections as per vertical spigot details.

HP Balcony Spigot Outlet

HP Refurbishment Outlet

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 gastight seal. Vertical screw outlets have a female parallel thread to BS 21 : 1985 for connecting directly to tubes conforming to BS 1387 : 1985 which is supplied with a taper male 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 connection to aluminium pipework, socketed and socketless cast iron pipework and PVC pipework.

The balcony outlet provides discrete safe drainage for balconies and walkways. Supplied complete with a D-shaped flat grating, the outlet can be installed against a wall. The grating is supplied with holes to receive either 50 mm, 75 mm or 100 mm nominal bore rainwater downpipes. These are easily cut on site to suit the application. HP Two-Way Screw Outlet

The two-way outlet is designed to be used at the junction of roofs and parapet walls, or wherever a horizontal and vertical surface meet. Available to fit pipe sizes of 50 mm, 75 mm and 100 mm. This flexible design of outlet allows either horizontal or vertical outflow take-off. Pipework connections as per vertical screw details.

When an existing flat roof is being upgraded, the refurbishment outlet is designed to fit inside the existing outlet and pipework with minimal disruption without the need to remove the original outlet. The aluminium body incorporates a wide fixing flange to enhance the bond with roofing membranes and does not suffer the distortion effects during the application of torched membranes. Outlets are supplied with a flexible finned pipe seal ensuring a watertight connection to existing pipework. The ease of use and minimal disruption to the existing rainwater system makes this an extremely cost effective solution when upgrading flat roofs.

HP Vertical Spigot Outlet - Dome Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

2HP-D

17001

1.7

2.39

3HP-D

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 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A

B Membrane

C D

Dimension

2HP-D

3HP-D

4HP-D

6HP-D

292

380

233

305

196

244

108

122

145

110

160

Specification Clause 11 The rainwater outlets 2HP-D/3HP-D/ 4HP-D/6HP-D* are to be ACO Building Drainage HP vertical spigot outlets with locked dome grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE.

All dimensions in mm.

Pipework Connections Vertical spigot outlets may be directly connected to the following:

Cast iron pipework to BS 416:1973 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.

All components to be manufactured from grade LM6 aluminium alloy to BS 1490/ gun-metal to BS EN 1982*. All components used within the scope of this system are shown on Drawing No. * and all work shall be carried out strictly in accordance with the manufacturers instructions and the installation details are set out on Drawing No. *. * please delete or complete as appropriate.

Watertight Rainwater Outlets Product Catalogue

HP Vertical Spigot Outlet - Flat Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

2HP-F

17002

1.7

2.51

3HP-F

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 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A

B Membrane

C D

Dimension

2HP-F

3HP-F

4HP-F

6HP-F

292

380

233

305

196

244

108

122

145

110

160

Specification Clause The rainwater outlets 2HP-F/3HP-F/ 4HP-F/6HP-F* are to be ACO Building Drainage HP vertical spigot outlets with locked flat grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE.

All dimensions in mm.

Pipework Connections Vertical spigot outlets may be directly connected to the following:

Cast iron pipework to BS 416:1973 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.

HP Vertical Screw Outlet - Dome Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

2HP-TD

17003

1.7

2.29

3HP-TD

17006

5.0

240

2.32

4HP-TD

100

10779

10.7

514

4.03

6HP-TD

150

17012

13.5

648

4.13

† Based on a 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A

B Membrane

Dimension

2HP-TD

3HP-TD

4HP-TD

6HP-TD

292

380

234

305

121

133

144

All dimensions in mm.

13 The rainwater outlets 2HP-TD/3HP-TD/ 4HP-TD/6HP-TD* are to be ACO Building Drainage HP vertical screw outlets with locked dome grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE. All components to be manufactured from grade LM6 aluminium alloy to BS 1490/ gun-metal to BS EN 1982*.

Pipework Connections Vertical screw outlets have a female parallel thread to BS 21 : 1985 for connecting directly to tube conforming to BS 1387 : 1985 which is supplied with a taper male thread. This ensures a completely watertight seal when screwed fully home into the outlet body.

Specification Clause

Screwed outlets are recommended where connection to the outlet occurs within the thickness of the slab and threaded connections will form a completely gastight seal within the slab. Refer to HP Accessories section for details of ABS adaptors that are available from ACO Building Drainage.

All components used within the scope of this system are shown on Drawing No. * and all work shall be carried out strictly in accordance with the manufacturers instructions and the installation details are set out on Drawing No. *. * please delete or complete as appropriate.

Watertight Rainwater Outlets Product Catalogue

HP 45° Spigot Outlet - Dome Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

245HP-D

17013

1.7

3.34

345HP-D

17014

5.0

240

3.77

445HP-D

100

17015

10.7

514

4.81

† Based on a 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A

B Membrane

Dimension

245HP-D

345HP-D

445HP-D

305

372

229

305

229

235

273

175

191

114

Specification Clause The rainwater outlets 245HP-D/345HPD/ 445HP-D* are to be ACO Building Drainage HP 45° spigot outlets with locked dome grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE.

All dimensions in mm.

Pipework Connections 45° spigot outlets may be directly connected to the following:

Cast iron pipework to BS 416:1973 or EN 877.

Connection to PVC pipework via heat shrink socket or pipe couplings.

HP 90° Spigot Outlet - Dome Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

290HP-D

17016

1.7

3.57

390HP-D

17017

3.3

171

3.61

490HP-D

100

17018

7.2

336

4.69

† Based on a 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A B

Membrane

C E

Dimension

290HP-D

390HP-D

490HP-D

305

329

405

229

305

124

121

142

232

267

285

110

Specification Clause 15 The rainwater outlets 290HP-D/390HPD/ 490HP-D* are to be ACO Building Drainage HP 90° spigot outlets with locked dome grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE.

All dimensions in mm.

Pipework Connections 90° spigot outlets may be directly connected to the following:

Cast iron pipework to BS 416:1973 or EN 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.

Watertight Rainwater Outlets Product Catalogue

HP Balcony Spigot Outlet - Flat Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

2HP-BO

17019

1.7

2.58

3HP-BO

17020

5.0

240

2.71

4HP-BO

100

17021

8.4

403

2.77

† Based on a 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A Membrane

242

C E D

G 186

Dimension

2HP-BO

3HP-BO

4HP-BO

270

205

125

235

180

110

All dimensions in mm.

Pipework Connections Balcony outlets may be directly connected to the following:

Cast iron pipework to BS 416:1973 or EN 877.

PVC ‘O’-ring socketed pipe to BS 4514 : 1985 (for 3HP-BO and 4HPBO outlets only).

Connection to 2HP-BO units via heat shrink socket or pipe couplings.

Specification Clause The rainwater outlets 2HP-BO/3HP-BO/ 4HP-BO* are to be ACO Building Drainage HP Balcony spigot outlets with locked flat grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE. All components to be manufactured from grade LM6 aluminium alloy to BS 1490/ gun-metal to BS EN 1982*. All components used within the scope of this system are shown on Drawing No. * and all work shall be carried out strictly in accordance with the manufacturers instructions and the installation details are set out on Drawing No. *. * please delete or complete as appropriate.

HP Two-Way Screw Outlet - Flat Grate Technical Information Flow Rate† (l/s)

Area Drained‡ (m2)

Product Code

Nominal Bore Pipe Size (mm)

Part Number

Vertical Outflow

Horizontal Outflow

Vertical Outflow

Horizontal Outflow

Weight (kg)

2HP-2W

17022

1.7

2.14

3HP-2W

17023

3.9

1.5

189

2.22

4HP-2W

100

17024

6.0

2.0

288

110

2.23

† Based on a 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions E

Membrane

Dimension

2HP-BW

3HP-BW

4HP-BW

204

191

214

45°

Overall Length

225

All dimensions in mm.

Pipework Connections Two Way outlets have a female parallel thread to BS 21 : 1985 for connecting directly to tube conforming to BS 1387 : 1985 which is supplied with a taper male thread. This ensures a completely watertight seal when screwed fully home into the outlet body.

Specification Clause 17 The rainwater outlets 2HP-2W/3HP-2W/ 4HP-2W* are to be ACO Building Drainage HP Two-Way screw outlets with locked flat grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE. All components to be manufactured from grade LM6 aluminium alloy to BS 1490/ gun-metal to BS EN 1982*. All components used within the scope of this system are shown on Drawing No. * and all work shall be carried out strictly in accordance with the manufacturers instructions and the installation details are set out on Drawing No. *. * please delete or complete as appropriate.

Watertight Rainwater Outlets Product Catalogue

HP Gully Spigot Outlet - Dome Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

3HP-GO

17025

5.0

240

3.89

4HP-GO

100

17026

10.4

500

4.02

† Based on a 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A

B Membrane

C D

Dimension

3HP-GO

4HP-GO

228

188

251

130

110

Overall Length

334

All dimensions in mm.

Pipework Connections Gully outlets may be directly connected to the following:

Cast iron pipework to BS 416:1973 or EN 877.

PVC ‘O’-ring socketed pipe to BS 4514 : 1985.

Specification Clause The rainwater outlets 3HP-GO/4HP-GO* are to be ACO Building Drainage HP Gully outlets with locked dome grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE. All components to be manufactured from grade LM6 aluminium alloy to BS 1490/ gun-metal to BS EN 1982*. All components used within the scope of this system are shown on Drawing No. * and all work shall be carried out strictly in accordance with the manufacturers instructions and the installation details are set out on Drawing No. *. * please delete or complete as appropriate.

HP Refurbishment Outlet - Dome Grate Technical Information Product Code

Nominal Bore Pipe Size (mm)

Part Number

Flow Rate† (l/s)

Area Drained‡ (m2)

Weight (kg)

3HP-RFO

17027

5.0

240

5.00

4HP-RFO

100

17028

5.0

240

5.10

† Based on a 35 mm head of water over the outlet body. ‡ Based on a rainfall intensity of 75 mm/hr. Flow rates based on BS EN 12056 : 2000.

Physical Dimensions A B Membrane

C D

E F G

Dimension

3HP-RFO

4HP-RFO

456

304

346

266

63.5

88.9

120

205

Specification Clause 19 The rainwater outlets 3HP-RFO/4HPRFO* are to be ACO Building Drainage HP Refurbishment outlets with locked dome grating supplied by ACO Building Drainage (a division of ACO Technologies plc), of Hitchin Road, Shefford, Bedfordshire, UK, SG17 5TE. All components to be manufactured from grade LM6 aluminium alloy to BS 1490/ gun-metal to BS EN 1982*.

All dimensions in mm.

Pipework Connections Refurbishment outlets are designed to fit the following range of existing pipework systems:

3HP-RFO : 71.5 to 78.5 mm internal pipe diameter.

4HP-RFO : 97.0 to 104.0 mm internal pipe diameter.

Watertight Rainwater Outlets Product Catalogue

HP Range Accessories 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.

PVC Adaptors

Terrace Grates

PVC adaptors are available for threaded outlets - HP Vertical Screw (HP-TD); and HP Two-Way (HP-2W) systems. ABS adaptors provide a quick and convenient connection to PVC and cast iron pipework.

Terrace grates are designed for installations with terraced paving slabs or block paviors. Terrace grates can only be used with circular raising rings as described above. A slotted fixing detail allows 90° rotational movement to accommodate slab/pavior patterns.

Raising Rings Raising rings are used where it is necessary to raise the level of the dome grating above the outlet body, for example an inverted roof construction. With the exception of the Balcony Outlets (HP-BO) and Gully Outlets (HP-GO), raising rings will only accept dome gratings or Terrace Grates as the raising rings will not accept the standard flat grates.

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 or EN 877. Raising rings are easily cut with a hacksaw on site if required to match installation requirements, i.e. to suit paving slabs. Stainless steel extension fixings are supplied with each raising ring. 20

PVC O-ring socketed pipe to BS 4514:1983.

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 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 1.5 mm steel sheet and finished primed in a red oxide paint finish. Suitable for all types of metal deck roofing.

HP Range Accessories - Raising Rings and Adaptors Raising Rings for Circular Outlets

Vertical Spigot, Vertical Screw, 45° Spigot, 90° Spigot and Refurbishment Outlets (dome grate only)

Outlet Model

Product Code

Part Number

Weight (kg)

2/3RR

17029

161

128

150

0.72

4/6RR

10730

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.

Raising Rings for Balcony Outlets Product Code

Part Number

Weight (kg)

17031

220

115

1.25

Part Number

Weight (kg)

17032

240

115

1.85

BO-RR A

All dimensions in mm.

Raising Rings for Gully Outlets

21 Product Code GO-RR A

All dimensions in mm.

ABS Adaptors L

Product Code

Part Number Male Thread Ø Outside Ø B A (BSP) (mm)

Length L (mm)

Length l (mm)

Weight (kg)

2STC

15007

2”

57.0

305

148

0.33

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.

Male thread A

Watertight Rainwater Outlets Product Catalogue

HP Range Accessories - Deck Support and Terrace Grates Deck Supports for Circular Outlets Sales Code: 2/3DS Outlet Model

335

2HP-D

Part No’s

Weight (kg)

Product Code

17033

1.97

2/3DS

17034

2.91

4/6DS

2HP-TD 3HP-D 3HP-TD

335

245HP-D 345HP-D 290HP-D 390HP-D

Sales Code: 4/6DS 4HP-D

415

4HP-TD 6HP-D 6HP-TD 445HP-D 490HP-D

415

3HP-RFO 4HP-RFO

All dimensions in mm.

Terrace Grates for Circular Outlet Raising Rings 22

Sales Code: 2/3 TG Outlet Model

160

2HP-D

Part No’s

Weight (kg)

Product Code

Appropriate Raising Ring Sales Code (Ref.)

17035

0.70

2/3TG

2/3RR

17036

1.52

4/6TG

4/6RR

2HP-TD 3HP-D 3HP-TD 245HP-D

345HP-D 290HP-D 390HP-D

Sales Code: 4/6TG 4HP-D

232

4HP-TD 6HP-D 6HP-TD 445HP-D 490HP-D 3HP-RFO 4HP-RFO 25

All dimensions in mm.

Appendices 1. Material Selection

3. Installation Guidelines

Overview

General Installation Notes

Aluminium Alloys

Threaded Outlets

Gun-metal

Balcony Outlets

Galvanised Mild Steel

HP Circular Raising Rings

Galvanic Corrosion

Balcony/Gully Outlet Raising Rings

The Electromotive Series

Deck Supports

Material Selection Tips

Refurbishment Outlet

2. Typical Roof Construction Detail Warm Roof

Inverted Roof

Un-insulated Roof

HP 90째 Outlet

Gully Outlet

Refurbishment Outlet

Balcony Outlet with Downpipe

Two-Way Outlet

Terrace Grate

Metal Deck Support

Watertight Rainwater Outlets Product Catalogue

Appendix 1 Material Selection Overview This section includes a brief insight into the materials that the rainwater drainage products featured in this Product Catalogue and Design Guide are manufactured from. 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.

Titanium 304 Stainless Steel (passivated) Silver Nickel Copper Gun-metal Lead Cast Iron Aluminium Zinc Magnesium

Aluminium Alloys

Gun-metal

Aluminium alloys are very common and can be found in a wide range of applications ranging from cooking utensils to spacecraft. The material is commercially available in excess of 99% purity and is used primarily for its high resistance to corrosion, lightness and strength.

Gun metal possesses good tensile strength and corrosion resistant properties and is used in many bearing and marine applications. ACO Building Drainage rainwater outlets are available in gunmetal when bi-metallic corrosion resistance arising from lead or copper materials is a potential risk.

Comparing similar products, aluminium alloys weigh around one-third as much as equivalent mild steel and stainless steel products and compared to mild steel, they have a much better corrosion resistance to atmospheric conditions.

Gun-metal is an alloy of copper, tin and zinc. Admiralty gun-metal typically has a composition of 88% copper, 10% tin and 2% zinc.

Because aluminium alloys are strong, lightweight, have good corrosion resistance, are cost effective and have excellent casting properties, this material is an obvious first choice for rainwater outlets and floor gullies. Additionally, being non-magnetic, aluminium will not attract ferrous particles that could otherwise cause silt traps and long term maintenance issues. ACO Building Drainage aluminium rainwater outlets, shower drains and floor drains use LM6 grade aluminium alloy to BS 1490. LM6 exhibits excellent resistance to corrosion in 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.

More noble - decreased corrosion

Less noble - increased corrosion

The Electromotive Series provides an insight to the corrosion effects between dissimilar materials.

The Electromotive Series The susceptibility of different metals to corrosion whilst in contact with each other depends upon the difference between the contact potentials. The greater the potential difference, the greater the tendency for corrosion. The metal with the higher negative potential forms the anode and is corroded preferentially.

Galvanised Mild Steel

Some examples from the Electromotive Series are shown opposite for illustration.

Mild steel is a convenient, ductile, easily worked and cost effective material that finds many uses in everyday applications around us.

Material Selection Tips

In its raw state, mild steel offers no resistance to corrosion and quickly forms a familiar rust (ferric oxide) on its surface unless precautions are taken to prevent oxidation taking place. Galvanising is a process that is commonly used to prevent corrosion and essentially consists of a layer of zinc applied to the surface of the steel. ACO Building Drainage use a â&#x20AC;&#x2DC;hot dipâ&#x20AC;&#x2122; process of dipping the component into a vat of molten zinc.

Galvanic Corrosion Galvanic corrosion occurs when two dissimilar metals are in electrical contact and connected by an electrolyte. An electrolyte conducts electricity and can be water solutions containing salts or acids and need not be concentrated for the effect to take place. The effects of galvanic corrosion begin to play an important part when an aluminium rainwater outlet is used in conjunction with metallic membranes, such as lead or copper.

For applications when dissimilar materials are in contact with each other wherever possible, select materials to be as close as possible to each other in the Electromotive Series. For example, if a roof is copper clad, select a gun-metal outlet as gun-metal is around 88% copper, this closely matches the cladding material.

Where dissimilar metals cannot be readily avoided, care must be taken to electrically insulate the adjacent materials. For example where lead is dressed into an aluminium alloy outlet, carefully paint the aluminium body and clamp components with good quality bitumen paint or use an insulating gasket material such as neoprene sponge. Ideally, a gun-metal outlet should be used in conjunction with 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.

Appendix 2 Typical Roof Construction Detail WARM ROOF A warm roof is where the main mass of the roof structure lies below the main thermal insulation. The waterproof membrane is positioned above the insulation.

Reflective layer Clamping of chippings Ring

Vapour Barrier

Two layer mastic asphalt

Raising Ring

Outlet body

Secure bolted grating

Rigid insulation board

Structural deck

Sand/cement screed to falls

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.

Gravel ballast

Clamping ring

Raising ring

Secure bolted grating

Rigid insulation board

Two layer mastic asphalt on isolating membrane

Outlet body

Structural deck

Sand/cement screed to falls

Watertight Rainwater Outlets Product Catalogue

UN-INSULATED ROOF A roof without thermal insulation. This type of construction is only permitted in non-habitable buildings, e.g. garages.

HP 90째 OUTLET Three layer built up felt roofing

Clamping ring

Secure bolted grating

Plywood deck

Firring piece

Insulation

Timber joist

Outlet body

Vapour barrier

Plaster ceiling

GULLY OUTLET Gunmetal clamping ring

Gunmetal domical grate

Sheet lead gutter lining

Rigid insulation board

Timber spaces in insulated gutter

Gunmetal body

Ply base

Rigid insulation board

Timber gutter

REFURBISHMENT OUTLET Two layer high performance Secure bolted grating felt layered onto vapour barrier

Clamping ring

Timber frame

Rigid insulation board

Vapour barrier

PU insulation port

PU expanded foam insulation

Pipe seal Existing rainwater pipe

Structural deck

Watertight Rainwater Outlets Product Catalogue

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 28 Grating Screw thread connector Clamping ring

Structural deck

Reflective chippings on three layer built up felt roofing

Vapour barrier

Rigid insulation board

TERRACE GRATE Rigid insulation board

Structural deck

Paving slabs ballasting

Raising ring

Terrace grate

Outlet body

Clamping ring

Sand/cement screed to falls

Paving slab support

Two layer mastic asphalt

METAL DECK SUPPORT Three layer felt

Timber fillet

Secure bolted grating

Clamping ring

Rigid insulation board with integral vapour barrier to falls

Metal closure panel

Metal deck

Screwed outlet body

Deck support

Watertight Rainwater Outlets Product Catalogue

Appendix 3 Installation Guidelines General Installation Notes

Balcony Outlets

All outlets must be securely attached to the roof structure using a suitable timber frame or deck support. The waterproof membrane must be fully dressed into the outlet body and securely clamped under the membrane clamp.

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.

Practical Design/Installation Tips

Do not design for the maximum outlet hydraulic capacity, allow a 10% factor of safety margin for intense storms and leaf/debris blockage.

Always allow for a back-up outlet, even though only one outlet may be required.

Rainwater outlets should be inspected and cleaned at least every 6 months to ensure reliable and continuous operation.

Threaded Outlets For all ACO Building Drainage threaded outlets (HP Vertical Screw and Two-Way outlets) are provided with female parallel threads conforming to BS 21:1985 for direct connection of threaded tube conforming to BS 1387:1985. This tube is supplied with a taper male thread conforming to BS 21:1985, which ensures a watertight joint when fully screwed into the unit. 30

Threaded outlets are particularly recommended where a connection to the outlet is made within the thickness of the concrete slab. In these applications, the threaded connection creates a completely watertight seal. Where an ABS screw thread connector (STC) is used in conjunction with threaded outlets, the screw thread connector should be assembled with PTFE tape to ensure a watertight seal.

HP Circular Raising Rings HP raising rings can be used for domed grating outlets and terrace gratings only. HP raising rings cannot be used with flat gratings. HP raising rings are secured with stainless steel fixings that are supplied with each raising ring product. Where required, the HP raising rings may be easily cut on site to a specific height using a 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 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.

Deck Supports ACO deck supports are recommended for 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.

Refurbishment Outlet Refurbishment outlets are designed to conveniently fit within the existing rainwater outlet of the roof that is being refurbished, which means there is no need to remove the existing rainwater outlet.

Step 1

Step 5

Strip back all roof coverings to the deck level. Clean out old outlet with wire brush and flush with clean water.

Flush with clean water to lubricate and insert tail pipe into existing pipework. Seat flange on timber frame.

Step 2

Step 6

Form timber frame around old outlet and lay insulation board/vapour barrier (35 mm minimum).

Screw flange to timber frame.

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 the void between the old and new outlet.

Membrane

Step 7 Step 3

Inject PU foam through one port for 5 seconds. Remove any surplus.

Check clearance and trim tail pipe to length with hacksaw if necessary. 31

Step 8 Step 4 Push on flexible labyrinth seal.

Blank off ports with captive screws. Complete installation and weatherproofing.

ACO Technologies plc ACO Business Park, Hitchin Road, Shefford, Bedfordshire SG17 5TE Tel: 01462 816666 Fax: 01462 815895 e-mail Sales: buildingdrainage@aco.co.uk website: www.acobuildingdrainage.co.uk

ÂŠ March 2008 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.

PC20379