Uniclass JR12/JS10 L731/L71121/L2123 CI/SfB (52.5) September 2004
AquaCell速 & Garastor速 Stormwater Management Systems
(90.51) WM417
Product and Installation Guide
FOR RESIDENTIAL, COMMERCIAL AND INDUSTRIAL APPLICATIONS
Intelligent Solutions for
Below Ground Projects
EPIC J3413 X721
STORMWATER MANAGEMENT SYSTEMS Introduction to OSMA - from Wavin
OSMA
From Wavin
OSMA, from Wavin Plastics Limited, is
Wavin is a leading European manufacturer
the leading name in plastic systems for
of industrial plastic products, and one of
building, construction and utilities. The
the largest producers of plastic pipe and
OSMA product range is unrivalled in
fittings in the world.
scope and quality, covering:
Wavin is credited with inventing and pioneering the use of plastic pipe
Above Ground systems Plumbing and Heating systems
for water distribution in the mid 1950s. Constant research and development has
Below Ground Drainage systems Water Management systems Ducting systems
enabled Wavin to maintain its position at the forefront of plastics technology.
Environmental responsibility
Water and Gas Distribution systems
Quality assured products
Wavin Plastics Limited has BS EN ISO 9001: 2000 BSI status and was the first plastic pipe manufacturer to be
OSMA systems are the benchmark for excellence and product innovation:
accredited to BS EN ISO 14001 Environmental Management Systems.
precision-manufactured in the UK using the most advanced injection moulding
Wavin Plastics Limited is committed to
and extrusion machines. All products
environmental responsibility, and is a
comply with or exceed relevant British
leading pioneer of systems to conserve
and European standards to ensure
and control water. In production,
reliability and long-lasting service.
the Company recycles the majority of waste materials, and sets annual
Intelligent connections OSMA systems offer integrated solutions. This enables specifiers and installers to assemble complete drainage, plumbing
targets for energy efficiency audited by the certifying body.
Passion and resourcefulness
and heating, and pressure pipe systems from a single source, with complete
All Wavin personnel are committed to
confidence in compatibility and
providing a comprehensive, responsive
performance.
service – and are passionate about delivering total Customer satisfaction.
All systems are backed by comprehensive technical support and a nationwide
Wavin Plastics Limited maintains an
distribution network to ensure availability
industry-wide dialogue and rigorous
when and where required.
assessment of all procedures to ensure that Wavin product development and product support accurately addresses the needs of all Customers – today and into the future.
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STORMWATER MANAGEMENT SYSTEMS Contents
Contents
General Introduction Introduction to AquaCell
4
Introduction to Garastor 20
Further information
5
Garastor System Overview
21
The following related publications are
Garastor Principal Components
22
available for OSMA Stormwater
Typical Garastor Installation Methods
23
Management systems:
Case Studies
24
Design and Installation Manual
Notes
25
Trade Price List
Technical Advice and Assistance
27
AquaCell System Overview How it Works Key Benefits
6 6 6
AquaCell Principal Components
7
Typical Soakaway Installation Method
8
Typical Storage Tank Installation Method
9
Literature requests Tel: 01249 766333
Typical Silt Trap Installation Method & Air Vent Design
To obtain copies, please contact:
10
Fax: 01249 766332
Typical Connections to AquaCell
11
literature@wavin.co.uk
Typical Air Vent Connections
12
Typical Manifold Configuration
13
Typical Soakaway Detail: Non-Traffic Loading
14
Typical Soakaway Detail: Highway
15
Typical On-Line Water Storage Detail
16
Typical Off-Line Storage Detail
17
Hydraulically Designed On-Line Water Storage System Installed Off-Line
18
Typical Soakaway Detail with Silt Trap 19
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STORMWATER MANAGEMENT SYSTEMS Introduction to OSMA from Wavin Contents â–
3
STORMWATER MANAGEMENT SYSTEMS General introduction
General Introduction Development of sites results in a large
Wavin Stormwater Management Systems
Management Systems means that they
proportion of area being covered by
have been developed to provide a method
can be tailored to suit the specific
impermeable surfaces such as roofs, car
of source control in two ways:
requirements of each site. They can be
parks and roads. Surface water run-off therefore increases up to 80%. Regulators (Environment Agency, Scottish Environment Protection Agency and local authorities) are promoting the use of Sustainable Drainage Systems (SuDS) that control run-off to that
By providing temporary storage for excess flows and limiting outflow to streams and rivers. By providing soakaways to infiltrate stormwater back into the ground. The modular nature of Wavin Stormwater
of a greenfield site (around 20%).
used to provide temporary storage, attenuation and infiltration capacity for runoff for all sizes and types of site: from individual houses up to the largest commercial developments. The systems comprise:
AquaCell速 Storage/Infiltration System Individual polypropylene modules assembled together to form an underground structure, used for stormwater storage or as a soakaway.
Small housing soakaway
Large scale storage tank
Highway drainage soakaway
Garastor 速 System* A polypropylene flow control chamber connected to a water storage reservoir EITHER made up of AquaCell units or located in a void beneath the garage of individual houses.
*Note: Garastor can be used as a flow control device for any AquaCell storage system, no greater than one unit deep with a discharge of up to 1.4 l/s via the 30mm release flow orifice.
Garastor domestic storage using garage void
Garastor domestic storage using AquaCell tank*
*Garastor is manufactured under licence (Patent Number GB2357093)
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STORMWATER MANAGEMENT SYSTEMS Introduction to AquaCell
Introduction to AquaCell
OSMA AquaCell Stormwater Management System
System is fully BBA (British Board of
water courses. When the capacities of
Agrément) approved, Certificate No.
these systems are exceeded the
Comprises individual infiltration modules
03/4018, and can meet with the Technical
consequences can be dramatic and
assembled together to form an
Requirements of NHBC.
damaging.
underground structure which can either be
Heavy storms and major cloudbursts are
Stormwater must be controlled; either by
used for stormwater storage or as an
becoming more frequent, resulting in ever
limiting the outflow and providing
alternative to domestic soakaways.
increasing volumes of stormwater flowing
temporary storage or where the ground
The AquaCell Stormwater Management
into conventional drainage systems and
conditions are suitable, providing soakaways for the stormwater to infiltrate back into the surrounding ground. This has the added benefit of recharging the local groundwater. Both options can be achieved using the OSMA AquaCell Stormwater Management System.
Large scale AquaCell storage tank
Domestic AquaCell soakaway
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STORMWATER MANAGEMENT SYSTEMS General Introduction Introduction to AquaCell® ■
5
STORMWATER MANAGEMENT SYSTEMS AquaCell System Overview
â–
How it works
â–
Key benefits
AquaCell System Overview
AquaCell System The OSMA AquaCell unit is modular in
Geomembrane/Geotextile Wrap
shape (1.0m x 0.5m x 0.4m), has a
An impermeable geomembrane wrap is
capacity of 190 litres and weighs 9Kg. It is
required for storage solutions and a
95% void and has a surface area that is
permeable geotextile wrap is required for
43% perforated. Conical columns within
soakaway solutions.
the unit ensure high strength and rigidity. The AquaCell units are clipped together in
Manifold Configuration
single layers and pegged together in
A junctioned pipework assembly
multiple layers. Conventional pipework is
providing a controlled multiple feed of
connected to the units by means of a
stormwater into the AquaCell Units.
number of adaptors.
The configuration is tailored to suit the capacity required upon entry
Control Manhole
into the AquaCell Unit assembly
This manhole is designed to limit the
and upon discharging to the
downstream discharge using an outflow
control manhole.
control and if necessary redirect the excess stormwater via an overflow control into the AquaCell units.
How it works Stormwater exceeding the capacity of the
unit is designed to bring surging water
outflow control. However if the wrap is
conventional drainage system is
under control and hold it in temporary
permeable, the temporarily stored water
attenuated by the control manhole and
storage. If the wrap that envelopes the unit
may be released into the surrounding
channelled into the AquaCell unit
assembly is impermeable the water will
ground; soil conditions permitting. By
assembly. The internal structure of each
remain in the unit assembly until such a
controlling the stormwater at source and
time as it can flow back into the control
recharging the local groundwater it not
chamber and discharge through the
only eases the pressure on conventional drainage systems but benefits the local environment as well.
Key benefits Significantly reduced risk of flooding and its consequences. Controlled and reduced volume discharge into existing main sewer systems and water courses. Aerobic purification stimulated within the system improves water quality. Sustainable, cost effective management of the water environment. Recharging the local groundwater.
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STORMWATER MANAGEMENT SYSTEMS AquaCell Principal Components
AquaCell Principal Components
1m
0.4m 6UR141 UltraRib S/S Adaptor (fits into pre-formed socket to connect to 150mm UltraRib)
AquaCell Unit 6LB100 0.5m 160mm diameter pre-formed socket
6TW141 TwinWall S/S Adaptor (fits into pre-formed socket to connect to 150mm TwinWall)
6LB102 Shear Connector (used to hold units together vertically)
4D916 160mm OsmaDrain P/E Adaptor (fits into pre-formed socket as an extension connection piece)
6LB105 Clip (used to hold units together horizontally)
6D099 160mm x 110mm OsmaDrain S/S Reducer (fits into pre-formed socket to connect to 110mm OsmaDrain)
6LB104 Flange Adaptor (Adaptor to be used at points other than pre-formed socket to connect to 150mm UltraRib)
Silt Trap 6LB600 (Extension Kit also available if required, see page 10 for details)
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STORMWATER MANAGEMENT SYSTEMS Overview How it works Key benefits Principal Components ■
■
■
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STORMWATER MANAGEMENT SYSTEMS Typical Soakaway Installation Method
Typical Soakaway Installation Method
Permeable Geotextile*
OSMA AquaCell Units 100mm
Pre-formed Socket 100mm Coarse Sand or Non Angular Granular Material Base and Surround
100mm
1. Excavate the trench to the required
recommended that the Wavin Silt Trap
depth ensuring that the plan area is
(6LB600) is installed prior to the inlet
slightly greater than that of the
pipework - see page 10 for installation
AquaCell Units.
guidelines.
2. Lay 100mm bed of coarse sand or non angular granular material, level and compact.
7. Wrap and overlap the geotextile covering the entire AquaCell structure. 8. Lay 100mm of coarse sand or non
3. Lay the geotextile* over the base and up the sides of the trench.
angular granular material between the trench walls and the AquaCell structure
4. Lay the AquaCell Units parallel with each other. In multiple layer
and compact. 9. Lay 100mm of coarse sand or non
applications, wherever possible,
angular granular material over the
continuous vertical joints should be
geotextile and compact. Backfill with
avoided. AquaCell units can be laid in a
stone free as-dug material.
‘brick bonded’ formation (i.e. to overlap
10. Rainwater from roof areas may
the joints below). For single layer
discharge directly into the soakaway
applications use the Wavin Clips and
but rainwater fromcarparks must
for multi layers use the Wavin Clips and
discharge through a catchpit manhole
the Wavin Shear Connectors.
or a petrol interceptor.
5. Fix the Wavin Adaptors to the AquaCell * The geotextile should be selected according to specific site conditions, however, typically a 300g material will be suitable. Specialist advice should be sought if surrounding soil characteristics exhibit a high degree of fines/low infiltration capacity and/or there is a high risk of damage from ground contaminants.
Units as required and connect pipework. 6. In order to prevent silt from entering the tank, clogging inlet pipework and reducing storage capacity, it is
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STORMWATER MANAGEMENT SYSTEMS Typical Storage Tank Installation Method
Typical Storage Tank Installation Method
Suitable Protective Geotextile Layer
OSMA AquaCell Units 100mm
Pre-formed Socket
100mm 100mm
Coarse Sand or Non Angular Granular Material Base
Suitable Impermeable Geomembrane*
1. Excavate the trench to the required
8. In order to prevent silt from entering
depth ensuring that the plan area is
the tank, clogging inlet pipework and
slightly greater than that of the
reducing storage capacity, it is
AquaCell units.
recommended that the Wavin Silt
2. Lay 100mm bed of coarse sand, level and compact. 3. Lay the geotextile over the base and up the sides of the trench. 4. Lay the geomembrane on top of the
Trap (6LB600) is installed prior to the inlet pipework – see page 10 for installation guidelines. 9. Wrap and overlap the geotextile covering the entire AquaCell
geotextile over the base and up the
structure, to protect the
sides of the trench.
geomembrane.
5. Lay the AquaCell units parallel with
10. Lay 100mm of coarse sand between
each other. In multiple layer
the trench walls and the Wavin
applications, wherever possible,
AquaCell units and compact.
continuous vertical joints should be
11. Lay 100mm bed of coarse sand over
avoided. AquaCell units can be laid in a
the geotextile and compact. Backfill
‘brick bonded’ formation (i.e. to overlap
with stone free as-dug material.
the joints below). For single layer applications use the Wavin Clips and
NB: A storage tank must be vented, and
for multi layers use the Wavin Clips and
it is recommended that one vent
the Wavin Shear Connectors (vertical
pipe, 110mm in diameter is provided
rods).
per 7,500 square metres of
6. Wrap the geomembrane around the AquaCell structure and seal to
impermeable catchment area on a site, see page 8 for design.
manufacturers recommendations.* * For large scale, deep installations a 1mm thick geomembrane is recommended and joints should be sealed using proprietary welding techniques. However, for shallow, domestic installations it may be suitable to use a geomembrane with taped joints. For further details contact Wavin Technical Services.
7. Place the Wavin Flange Adaptor into position (at a point other than the preformed socket) and fix using self tapping screws. Drill a hole through the Flange Adaptor and connect pipework.
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STORMWATER MANAGEMENT SYSTEMS Soakaway Installation Storage Tank Installation ■
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STORMWATER MANAGEMENT SYSTEMS Typical Silt Trap Installation Method
■
Typical Air Vent Design
Typical Silt Trap Installation Method COVER & FRAME – 1.2m deep use 6D.935. Greater than 1.2m deep use 6D.939 with reduced opening of 350mm
150mm side fill as dug material with no particle sizes larger than 40mm
SHAFT 500mm 1250mm
100mm bed as per pipe bedding specification
450mm
1. Place the Silt Trap (6LB600) on a
160mm OsmaDrain Inlet/Outlets or use the appropriate adaptor to connect to 110mm OsmaDrain, 150mm TwinWall or UltraRib
4. Fit relevant cover and frame according
minimum of 100mm bed as per pipe
to the depth of unit: Up to and
bedding specification. Ensure that the
including 1.2m deep = 6D935 Deeper
unit is as close to AquaCell tank as
than 1.2m = 6D939.
possible and in a suitable position to Notes:
allow pipework connection.
When surrounded by a concrete plinth (150mm x 150mm) the cover can be used in situations with a loading of up to 30Kn (3 tonnes) i.e domestic driveways.
2. Connect the relevant pipework in accordance with standard pipe installation guidelines.
The silt trap can be extended (if required) using the 500mm Extension Kit (see details on page 20) in conjunction with a 500mm shaft of TwinWall cut to suit.
3. Surround the sides of the Silt Trap with 150mm of ‘as dug’ material, with no particle sizes larger than 40mm.
Typical Air Vent Design
Balloon Grating 4S302
Ventilation Box (4D706)
110mm OsmaDrain Pipe
Flange Connector 6LB104
150mm x 110mm Reducer (6UR099) Geomembrane sealed to Flange
Note: It is recommended that one vent pipe, 110mm in diameter, is provided per 7,500 square meters of impermeable catchment area on a site. Please contact Wavin Technical Services for further details.
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STORMWATER MANAGEMENT SYSTEMS Typical Connections to AquaCell
Typical Connections to AquaCell Note: It is recommended that all connections and air vent installations in storage applications (using geomembrane) are made using a Flange Adaptor. Adhesive or double sided tape should be used between the geomembrane and the flange plate to ensure a watertight seal.
Permeable Geotextile Wrap
Jubilee Clip
Connection for soakaway application using either the pre-formed socket (as shown below) or standard adaptors into pre-formed socket*
*Note: For pipework other than 160mm OsmaDrain, these adaptors can be used to connect to the following: 6TW141: TwinWall S/S Adaptor connects to 150mm TwinWall 6D099: 110mm OsmaDrain Adaptor connects to 110mm OsmaDrain 4D916: 160mm OsmaDrain PE Adaptor connects to 160mm OsmaDrain 6UR141: UltraRib S/S Adaptor connects to 150mm UltraRib
160mm OsmaDrain
Coarse Sand or Non Angular Granular Material Base and Surround
Geomembrane Wrap
Connection for storage application using flange adaptor at points other than preformed socket Installation Procedure:
Flange Adaptor (6LB104)
1. Fix Flange Adaptor to the AquaCell unit with self tapping screws 2. Drill through geomembrane and AquaCell unit with a long 150mm Crown Drill Bit Cutter 3. Insert pipework into Flange Adaptor
150mm Pipework to suit Coarse Sand or Non Angular Granular Material Base and Surround
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STORMWATER MANAGEMENT SYSTEMS Silt Trap Installation Air Vent Design Connections to AquaCell ■
■
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STORMWATER MANAGEMENT SYSTEMS Typical Air Vent Connections
Typical Air Vent Connections Note:
Connect suitable pipework to form air vent Geomembrane Wrap Flange Adaptor (6LB104)
It is recommended that all connections and air vent installations in storage applications (using geomembrane) are made using a Flange Adaptor. Adhesive or double sided tape should be used between the geomembrane and the flange plate to ensure a watertight seal.
Connection onto top of AquaCell unit using Flange Adaptor Installation Procedure: 1. Fix Flange Adaptor to the AquaCell Unit with self tapping screws 2. Drill through geomembrane and AquaCell unit with a long 150mm Crown Drill Bit Cutter 3. Insert pipework into Flange Adaptor to form air vent
Coarse Sand or Non Angular Granular Material Base and Surround
Permeable Geotextile Wrap Jubilee Clip
Suitable bend and pipework to form air vent
OsmaDrain S/S Reducer (6D099)
Connection into side of AquaCell unit using standard adaptors Coarse Sand or Non Angular Granular Material Base and Surround
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STORMWATER MANAGEMENT SYSTEMS Typical Manifold Configuration
Typical Manifold Configuration
AQUACELL UNITS
150mm ULTRARIB
300mm ULTRARIB
Note: Pipe configuration is dependent on maximum flow. Alternative pipe systems such as Wavin TwinWall and OsmaDrain can be used. Please contact Wavin Technical Services for further details.
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STORMWATER MANAGEMENT SYSTEMS Typical Air Vent Connections Typical Manifold Configuration â–
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STORMWATER MANAGEMENT SYSTEMS Typical Soakaway Detail: Non-Traffic Loading
Typical Soakaway Detail: Non-Traffic Loading
ROOF AREA = 98m2
S
KEY:
S
= AquaCell Soakaway (see note 2)
S
DEEP SOAKAWAY NON-TRAFFIC LOADING AREA
Notes:
Min Depth 0.5m
1. Soakaways should be sited at least 5m away from the building. (Ref BS8301) 2. The exact size and shape of the soakaways are to be determined once all the necessary calculations have been produced.
TRENCH SOAKAWAY NON-TRAFFIC LOADING AREA
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STORMWATER MANAGEMENT SYSTEMS Typical Soakaway Detail - Highway
TO SOAKAWAY
150mm ULTRARIB
FOR MINIMUM DEPTH OF COVER CONTACT WAVIN
FOOTPATH
225mm ULTRARIB
SILT TRAP
150mm ULTRARIB
TO ROAD GULLY
150mm CONCRETE SURROUND
FINISHED ROAD LEVEL
Typical Soakaway Detail - Highway
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STORMWATER MANAGEMENT SYSTEMS Soakaway Details: Non-Traffic Loading Highway ■
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STORMWATER MANAGEMENT SYSTEMS Typical On-Line Water Storage Detail
SUMP
REVERSE BACKDROP OVERFLOW
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SUMP
MESH LEAFGUARD
PRIVATE CATCHPIT
AIR VENT
DIRECTION OF FLOW
GROUND LEVEL
PRIVATE CATCHPIT WITH FLOW CONTROL DEVICE
110mm OSMADRAIN
Typical On-Line Water Storage Detail
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STORMWATER MANAGEMENT SYSTEMS Typical Off-Line Water Storage Detail
NON-RETURN FLAP VALVE
SUMP
WEIR WALL
AIR VENT
GROUND LEVEL
CONTROL CHAMBER WITH FLOW CONTROL DEVICE
INCOMING PIPE
Typical Off-Line Water Storage Detail
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STORMWATER MANAGEMENT SYSTEMS On-Line Water Storage Detail Off-Line Water Storage Detail ■
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STORMWATER MANAGEMENT SYSTEMS Hydraulically Designed On-Line Water Storage System Installed Off-Line
SUMP
OUTFLOW CONTROL DEVICE
REVERSE BACKDROP OVERFLOW PIPE
AIR VENT
CONTROL CHAMBER
INCOMING 150mm ULTRARIB
Hydraulically Designed On-Line Water Storage System Installed Off-Line
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STORMWATER MANAGEMENT SYSTEMS Typical Soakaway Detail with Silt Trap
Typical Soakaway Detail with Silt Trap
For bedding specification information refer to page 10.
450mm
The silt trap can be used in conjunction with a soakaway (as shown) or a storage tank.
FOR MINIMUM DEPTH OF COVER CONTACT WAVIN
160mm OSMADRAIN
GROUND LEVEL
160mm OSMADRAIN
SILT TRAP
160mm OSMADRAIN
1250mm
Notes:
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STORMWATER MANAGEMENT SYSTEMS Hydraulically Designed Soakaway Detail with Silt Trap ■
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STORMWATER MANAGEMENT SYSTEMS Introduction to Garastor
Introduction to Garastor ÂŽ*
Development of sites results in a large proportion of area being covered by impermeable surfaces such as roofs, car parks and roads. Surface water run-off therefore increases up to 80%. Building Regulations and guidance now requires a sustainable approach to development, which minimises the effects of run-off to that of a greenfield site (20%). Developed in collaboration with Bryant Homes, Garastor (polypropylene control chamber) represents a house by house, rather than a development wide approach, to stormwater management. Garastor controls the flow of water at source by temporarily storing water under a soft landscaped area using the AquaCell system or in the void space under the
Garastor – polypropylene control chamber
floor slab of a residential garage. It eliminates the need for costly, spacehungry, on-site communal water-storage structures or ponds which enables better use of developable land. During high intensity rainfall, water from the roof or hardstanding areas is diverted via the Garastor control unit into the storage void. As the storm subsides the rainwater can be slowly released back into the main drainage system. Note: Garastor can be used as a flow control device for any AquaCell storage system, no greater than one unit deep with a discharge of up to 1.4 l/s via the 30mm release flow orifice.
Internal view of Garastor
*Garastor is manufactured under licence (Patent Number GB2357093)
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STORMWATER MANAGEMENT SYSTEMS Garastor System Overview
Garastor ÂŽ System Overview
Garastor System The Garastor unit is a polypropylene chamber that connects to a water storage reservoir. There are two versions of the Garastor available both of which are 500mm in diameter, the 6SC500 version is 1m deep for garage installations (with a 300mm storage depth capacity) and the 6SC501 is 1.25m deep for use with AquaCell (with a 400mm storage depth capacity). When Garastor is used in conjunction with an AquaCell tank the configuration of units must be no deeper than 1 AquaCell unit. If site conditions are such that a deeper Garastor unit is required then the 500mm Extension Kit (6SC205 - consisting of a coupler and two ring seals) can be used in conjunction with a shaft of 500mm Twinwall cut to suit, to extend the Garastor unit.
HOW IT WORKS Storm or surace water flows through two 110mm diameter incoming pipes. If the flow is light to moderate, the water is simply stored in the chamber before being slowly released through a 30mm orifice. However, if the inflow is heavy, excess water in the chamber discharges through a 150mm diameter pipe into the water storage area (either the undercroft of a garage or an AquaCell tank). The water is temporarily stored until the water level inside the chamber has dropped sufficiently, and the water can flow out to
KEY BENEFITS
the drainage system via the 110mm
No use of valuable, developable land.
outflow pipe.
Safer than open/above ground storage structures.
Inside the Garastor chamber there are
Caters for 1 in 150 year storm.
specially designed weir walls that ensure
Spreads cost of water storage over the development period.
that the hydraulics of the unit work to the
Maintenance free, with no moving parts or filters.
optimum levels.
Run-off reverts to that of a greenfield site.
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STORMWATER MANAGEMENT SYSTEMS Introduction to Garastor Garastor System Overview â–
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STORMWATER MANAGEMENT SYSTEMS Garastor Principal Components
Garastor ® Principal Components
500mm diameter
6TW142 TwinWall D/S Adaptor (150mm TwinWall socket x 160mm OsmaDrain socket for connection of 150mm TwinWall pipe to 160mm OsmaDrain pipe)
1m (6SC500) 1.25m (6SC501) 150mm TwinWall Socket (for connection to other pipe materials, a small section of 150mm TwinWall is required, alternatively use the 150mm Garastor Connection Kit (6SC200 – consisting of a short section of 150mm TwinWall pipe and two ring seals)
Garastor 6SC500 (for use with garage undercroft) 6SC501 (for use with AquaCell)
6TW148 TwinWall D/S Adaptor (150mm TwinWall socket x 150mm UltraRib socket for connection of 150mm TwinWall pipe to 150mm UltraRib pipe)
6D935 < 1.2m deep 6D939 > 1.2m deep Covers and Frames
+
6SC205 Extension Kit (a shaft of 500mm TwinWall pipe or an Inspection Chamber Shaft (6D938 - 3.0m length / 6D934 - 1.5m length) cut to suit will also be required)
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6TW145 TwinWall S/S Adaptor (150mm TwinWall socket x 150mm UltraRib spigot for connection of 150mm TwinWall pipe directly to 150mm UltraRib socket)
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6TW141 TwinWall S/S Adaptor (150mm TwinWall socket x 160mm OsmaDrain spigot for connection of 150mm TwinWall pipe directly into the AquaCell pre-formed socket)
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STORMWATER MANAGEMENT SYSTEMS Typical Garastor Installation Methods
Typical Garastor ® Installation Methods
1. Place the Garastor Unit (6SC500 or
Garastor installation using garage void
6SC501) on a minimum of 100mm
Rainwater pipe (or air brick) for ventilation
“as-dug” or granular material. Ensure that the unit is as close to the garage undercroft or AquaCell structure as possible and in a suitable position to allow pipework connection. Note: It is important to ensure that the chamber is placed in a level position and that the invert of the 150mm pipe connection is level with the base of the concrete undercroft or the base of the AquaCell units.
Bitumastic paint applied to walls of void area and underside of the garage floor cover and frame Wall to retain storage area 150mm outflow pipework to undercroft/void
2. Connect pipework in accordance with standard pipe installation guidelines. 3. Surround the Garastor unit with 150mm of similar material to that used for the bedding.
1200g polythene damp proof membrane
Garastor (6SC500)
110mm outflow pipework to drainage system
110mm inflow pipework to chamber
75mm thickness of smooth finished 50mm concrete Stored water sand layer
Note: The depth of foundations for standard block and beam garage floors will need to be lowered by approx. 300mm to accommodate the storage capacity required.
4. Fit relevant cover and frame according to depth of unit: Up to and including1.2m deep 6D935 Deeper than 1.2m6D939
Garastor installation using AquaCell Note: When surounded by a concrete plinth (150mm x 150mm) the cover can be used in situations with a loading of upto 30Kn (3 tonnes) i.e. domestic driveways.
Cover and Frame
Suitable impermeable geomembrane AquaCell storage tank
5. Adequate ventilation must be provided: -
to the garage undercroft using either air bricks or rainwater downpipes connected directly into the storage area.
-
to the AquaCell structure using an air vent (NB. One air vent is required per 7,500 square metres of impermeable area to be drained).
Garastor (6SC501)
Notes: When using Garastor with the undercroft/void of a garage, it is the responsibility of the designer to ensure that the enhancement to the garage undercroft/void and drainage works comply with current prevailing Building Regulations.
Also to prevent softening of the soils below the foundations or loss of fines leading to settlement, the void beneath the garage should be lined as follows: Underneath the concrete base of the void area there should be a 1200g polythene damp proof membrane Bitumastic paint should be applied to the walls of the void area and to the underside of the reinforced garage floor beams.
STORMWATER MANAGEMENT SYSTEMS Product & Installation Guide 2004
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STORMWATER MANAGEMENT SYSTEMS Garastor Principal Components Garastor Installation Methods ■
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STORMWATER MANAGEMENT SYSTEMS Case studies
Case studies
The sky’s the limit for Wavin Plastics
AquaCell passes toughest tests during worst storms for 50 years
Weathering the storm on Brownfield Land
THE CLIENT:
THE CLIENT:
THE CLIENT:
Birmingham Airport
Ilchester Cheese Company
Graham & Brown Wallcovering
THE PROBLEM:
THE PROBLEM:
THE PROBLEM:
To prevent flooding on a new long-stay
Controlling flooding/water on a regularly
How to manage/control storm or flood
car park covered with paving, and help
flooded area.
water on a low lying brownfield site,
the Airport to comply with its policy of
adjacent to a river with a history of THE SOLUTION:
flooding, and prevent the leaching of
In order to control stormwater at the
contaminants into the high water table
THE SOLUTION:
Ilchester site, a system which comprised
from the site which used to be a power
Over 7,000 AquaCell infiltration modules
of 1,352 AquaCell units was installed to
station.
were installed on the site providing a
limit the outflow and provide temporary
robust and long life infiltration base. A
storage.
sustainable development.
THE SOLUTION:
permeable geotextile was the only other
To collect stormwater from the
component required to complete the
THE QUOTE:
development in a trench surrounding the
installations.
“What we have seen at the Cheese
new factory filled with 2,000 Wavin
Company over the past fortnight is
AquaCell units clipped together,
THE QUOTE:
evidence of a highly successful system.
encapsulated in a robust fully welded
“Wavin’s solution to stormwater
The surrounding area is completely
hydrocarbon resistant geomembrane,
management combines practical and
waterlogged with the river only half a mile
which in turn was wrapped in a non-
operational benefits over the alternative
down the road. Our site is bone dry - any
woven needle-punched geotextile.
methods available to the developer. Its
risk of damaged land has been alleviated”.
system proved to be economically and
THE QUOTE:
functionally favourable whilst providing
“The 95% void capacity of Wavin’s system
storage of over 1,300 cubic metres of
was a key factor for us. The original
surface water run-off.”
proposal for the site was based on installing stone-filled trenches with a maximum void capacity of 30%.”
24
CUSTOMER SERVICES 01249 766611
TECHNICAL ENQUIRIES 01249 766655
TECHNICAL FAX 01249 766653
EMAIL info@wavin.co.uk
STORMWATER MANAGEMENT SYSTEMS Notes
STORMWATER MANAGEMENT SYSTEMS Product & Installation Guide 2004
www.wavin.co.uk
STORMWATER MANAGEMENT SYSTEMS Case studies Notes ■
25
STORMWATER MANAGEMENT SYSTEMS Notes
26
CUSTOMER SERVICES 01249 766611
TECHNICAL ENQUIRIES 01249 766655
TECHNICAL FAX 01249 766653
EMAIL info@wavin.co.uk
STORMWATER MANAGEMENT SYSTEMS Technical Assistance
n
Further Information
Technical Advice Contents and Assistance
Further Information
OSMA Stormwater Management systems
STORMWATER MANAGEMENT SYSTEMS
are backed by Wavinâ&#x20AC;&#x2122;s comprehensive
The following related publications are available for OSMA
technical advisory service. This is available
Stormwater Management systems:
to provide expert assistance at every stage
Design and Installation Manual
of a project, from planning and product selection to installation and maintenance. Services include:
Trade Price List
ASSOCIATED OSMA SYSTEMS OSMA systems are fully integrated to provide a total
Full technical literature, including:
solution for above and below ground drainage,
- System Product Guides
plumbing and heating. Contact Wavin Technical
- Design and Installation Guides
Design Department for further details regarding:
- Trade Price Lists Contact Wavin Technical Design Department for prompt assistance:
TECHNICAL DESIGN Tel: 01249 766655 Fax: 01249 766653 Email: technical.design@wavin.co.uk
OSMA Rainwater systems OSMA Soil & Waste systems OSMA Flexible Plumbing systems OSMA Underfloor Heating systems OSMA Below Ground Drainage systems OSMA Water Management systems OSMA Ducting systems OSMA Pressure Pipes for Water OSMA Pressure Pipes for Gas
WAVIN ONLINE The complete OSMA product catalogue, together with design and installation guidance, is also available online at: www.wavin.co.uk To request a copy of any item(s) of current
All literature can be downloaded via the searchable PDF library at
literature, please contact:
www.wavinpdfs.co.uk
LITERATURE REQUESTS Tel: 01249 766333 Fax: 01249 766332 Email: literature@wavin.co.uk
Wavin images can be downloaded at different resolutions from www.wavinimages.co.uk
STORMWATER MANAGEMENT SYSTEMS Product & Installation Guide 2004
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STORMWATER MANAGEMENT SYSTEMS Notes Technical Further Information n
n
27
AquaCell速 & Garastor速 Stormwater Management Systems
Product and Installation Guide
Meeting your needs OSMA Water Management systems, developed by Wavin Plastics Limited, form part of a comprehensive range of plastic systems to provide intelligent solutions for all building, construction and utilities projects. These include: Above Ground Projects OSMA Rainwater systems OSMA Soil & Waste systems Plumbing & Heating Projects OSMA Flexible Plumbing systems OSMA Underfloor Heating systems Below Ground Projects OSMA Below Ground Drainage systems OSMA Water Management systems OSMA Ducting systems Pressure Pipe Projects OSMA Pressure Pipes for Water OSMA Pressure Pipes for Gas
Wavin Plastics Limited Parsonage Way Chippenham Wiltshire SN15 5PN Tel: 01249 766600 Fax: 01249 443286 Email: info@wavin.co.uk
Wavin Plastics Limited operates a programme of continuous product development, and therefore reserves the right to modify or amend the specification of their products without notice. All information in this publication is given in good faith, and believed to be correct at the time of going to press. However, no responsibility can be accepted for any errors, omissions or incorrect assumptions. Users should satisfy themselves that products are suitable for the purpose and application intended.
www.wavin.co.uk
WM417
All OSMA systems are backed by full technical literature and project support. See inside back cover for details.
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