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Stormwater Attenuation Accessories
These stormwater attenuation accessories allow further functionality to SuDS systems.
In this section you will find:
- Upstream screening and debris chambers
- attenuation flow control and backflow prevention devices
Outlet Flap Valve, Anti Flood Non-Return Valve
£69.00
Please note there are two versions of this valve, this is the outlet flap valve suitable for placing onto the end of plain ended pipe. The Inline flap valve version can be found here. Non Return Valves for drainage and water pipes, available in two sizes 110mm and 160mm. Slips onto the end of pipes. Effective Anti-flood Valve and Rat Barrier D...
SuDS Rainwater Attenuation Sizing Design Calculation
£120.00
If you or your client are at the pre planning stage, have a planning condition or need to satisfy building control you may require an Attenuation tank or Soakaway sizing design to demonstrate the attenuation volume required. The output is a pdf document which provides the attenuation volume required. What we require: Address and Postcode o...
In line Back Flow Prevention Non Return Valve 110mm, 160mm, 200mm
£69.00
Please note there are two versions of this valve, this is the outlet flap valve suitable for placing onto the end of plain ended pipe. The Inline flap valve version can be found here. Inline Enclosed Back Flow Prevention Non Return Valve Backflow Prevention Valves (non-return valves) effectively secure any rooms located on the lower floors ag...
FlowBrake SuDS Attenuation Tank Orifice Plate
£29.00
As the name suggests the FlowBrake Orifice allows a simple orifice control and is suitable in situations where a varying a peak discharge condition is permitted. The orifice plate is fabricated from PVC and the orifice designed and fabricated in accordance with BS1042 and can simply be placed within any standard 110mm/160mm socket, 110mm/160mm t...
Soakaway test (BRE 365) Greater Manchester
£300.00
In order to design a soakaway the ground conditions must be known. Specifically, the infiltration rate must be determined using the method defined in the Soakaway test (BRE 365). This measure is used to determine the volume and plan area of the soakaway. The Infiltration Test will be performed by a Chartered Civil Engineer. This service is ava...
300mm Chamber Extension Riser
£25.00
This silt trap extension riser is designed to be used with our SS300 amd SS500 series of silt traps and also OFCP300/1 series of our Orifo. It will increase the height of the silt trap chamber or Oriflo by ~ 135mm and a lid can be placed on top. Includes the rubber seal. Please note - This is not suitable for the SS300HD version
Soakaway Sizing Design Calculation BRE 365/CIRIA 3D
£120.00
If you or your client are at the pre planning stage, have a planning condition or need to satisfy building control you may require a Soakaway sizing design to demonstrate the soakaway volume required. The output is a pdf document which provides the soakaway dimensions required. The calculation will be performed as per CIRIA 3D method as stand...
GRAF shaft chamber extension piece
£269.00
GRAF chamber extension piece, 600mm diameter available in: 300mm Height (achieves ~ 265mm lift. 1210mm Height 1210mm Height with 200mm pipe fitting high level overflow stub. These riser sections are suitable for: Platin, Carat and Sustainable Urban Drainage systems. Heights given are nominal reference heights and will not provide the co...
Stainless Steel Vortex Flow Control Device
£919.00
*Please note these are built to order - lead time 15-20 working days* *Curved mounting price assumes 1200mm chamber or smaller. For larger chambers, flows or head please get in touch* Vortex Flow Control devices are devices used downstream of attenuation systems. They operate by generating a vortex flow path within the device which in turn impe...
Silt Guard 300 Series Silt Trap for 110 and 160mm Pipework with Filter Bucket and Access Cover
Silt Guard 300 Series Silt Trap for 110 and 160mm Pipework with Filter Bucket and Access Cover
£259.00 £279.00
The Silt Guard range has been designed for the catchment and removal of silt and debris from the run off from impermeable and hard standing surface areas, such as: roofs, path and driveways, patios, car parks, roads and highways. Installation of a Silt Guard as part of a SuDS design, will provide effective primary treatment for the surface wate...
GRAF telescopic shaft cover access lid
£219.00
GRAF Cast Iron Telescopic Dome Shaft. Suitable for use with the GRAF Carat S and Platin tanks. The 600mm diameter pedestrian lid is available in both mini and maxi options which is a reference to the rise available. Dimensions are nominal reference and will not provide the corresponding rise due to the overlap required. Please email technical ...
FlowBrake SuDS Attenuation Tank Floating Outflow Regulator with strainer
£59.00
FlowBrakeTM fixed head orifice SuDS flow regulator with strainer. If you require a SuDS flow regulator with an open orifice please see this product. This product is suitable were there is no or low upstream filtration. Turn any tank into an attenuation tank using this smart device. The floating intake ensures there is a fixed level of water...
Accesso Chamber Access Covers
£69.00
Accesso Inspection Chamber Access Covers available with the following options: Size (mm) Shape (Circular/square) Loading Capacity (Tonnes) Product Code Product Description Description Additional Comments 300ACC Access Coverø300mm Circlular Cover35kN Pedestrian Loading ø300mm Access Cover, Circle (35kN Pedestrian Loading) Frame l...
40mm internal overflow tank connection kit
£9.99
A neat way to an install an overflow is to incorporate the overflow internal to the water butt. This kit allows a tank connector to be fitted inside a water butt allowing the excess water to flow Kit 1 : Tank Connector +gasket Y branch Blanking plug Requires vertical piece of 40mm push fit pipe to suit water butt Kit 2 : As Kit 1 with the add...
Oriflo Flow Control 300mm ø Chamber P Series
£369.00 £389.00
**Flow rate and head must be provided via email upon purchase** The Oriflo range is a series of Orifice Flow Control Chambers accommodating a range of flow rates 300mm diameter, pre-assembled flow control chamber, delivered ready to install The P models are classed as unprotected orifice chambers and are specifically designed for installation d...
Surface Mounted (Hozelock/Snap-lock) Hose Connection Box
£89.00
For the convenient extraction of rain water in the garden. For jet pump and submersible pump incl. 2-way valve and 1'' hose connection. Made of robust and weather-resistant plastic Ideal addition to the complete packages Garden Comfort, Eco Plus and Professional Available in two options : External Internal, flush with lid suitable for a GRAF...
Vortiflo Vortex Flow Control Chamber
£2,239.00
*POA, head and flow required to price correctly* **Please not these are built to order - lead time 10-15 working days** ***The Vortiflo range is not supplied with a cover*** Vortiflo Vortex Flow Control Chambers are specifically designed for controlling the flow of storm water from large volume attenuation systems, preventing downstream flooding...
DROP Level 3 Rainwater Harvesting Calculation (Desktop Feasibility)
£120.00
If you're considering rainwater harvesting on a commercial scale or trying to achieve water neutrality a Level 3 Rainwater Harvesting Calculation may be suitable. Our level 2 analysis is available for free by clicking this link. For large or complex schemes where significant economic benefits might be realised or where there is a temporal varia...
SuDS attenuation lifting pump set
£269.00
Occasionally storage required for SuDS attenuation can not be provided in such away which allows gravity drainage to the surface water drain. In this case a pump will be required to lift the water from the attenuation storage to the a point of free gravity discharge into the sewer. This submersible pump can be a arranged with a downstream flow...
Oriflo Flow Control 450mm ø Chamber P Series
£499.00
**Flow rate and head must be provided via email upon purchase** The Oriflo range is a series of Orifice Flow Control Chambers accommodating a range of flow rates 450mm diameter, pre-assembled flow control chamber, delivered ready to install The P models are classed as unprotected orifice chambers and are specifically designed for installation d...
Oriflo Protected Flow Control 600mm Ø Chamber C Series
£849.00
**Flow rate and head must be provided via email upon purchase** The Oriflo range is a series of Orifice Flow Control Chambers accommodating a range of flow rates Within the Oriflo range we have our protected orifice chambers that features a 100% recycled thermoplastic block (blok). This blok is installed into our rotational moulded chambers fo...
Tank Level Warning Alarm Kit with Battery Back up optional float and cable
£219.00
This simple to install sewage pumping station high-level alarm unit is designed for audible/visual alarm of pump plant failure. It features a 90dB/1m alarm and LED warning light, the alarm also comes complete with a battery backup in case of mains power failure. The Float switch comes with 10m of cable. Tank Level Warning Alarm Kit with Bat...
FlowBrake SuDS Attenuation Tank Floating Outflow Regulator (Open Orifice)
£99.00
FlowbrakeTM fixed head open orifice SuDS flow regulator. If you require a SuDS flow regulator with a strainer please see this product. This product is suitable were there is an upstream filtration (basket filter) present since no filtration is provided at the orifice. Turn any tank into an attenuation tank using this smart device, a simple alt...
Silt Bucket for Yard Gully
£179.00
This filter basket has an alloy screen filter fitted, providing more efficient separation of the silt When the basket is full, this weighs a maximum of 20 kg, allowing a single person to lift and clear any debris. External Diameter 300mm Depth 300mm Filter Diameter 3mm Side Hole diameter 42mm Handle Length 500mm
GRAF shaft chamber extension sleeve compact
£189.00
GRAF chamber extension piece, 600mm diameter. These riser sections are suitable for: Platin and the 1000l compact tank. Heights given are nominal reference heights and will not provide the corresponding rise due to the overlap required. Please email technical with your rise requirement before purchase. Download Drawing
SuDS Attenuation Tank Floating Outflow Restrictor 0.05-2l/s (Open Orifice)
£329.00
If you require a SuDS flow regulator with a strainer please see this product. This product is suitable were there is an upstream filtration (basket filter) present since no filtration is provided at the orifice. Turn any Platin or Carat tank into an attenuation tank using this smart device, a simple alternative to other more complex attenuatio...
SuDS drainage Variable Orifice Choke Drain Chamber
£599.00
Orifice Flow Control is a form of flow control used commonly in SuDS applications. Orifice flow control chambers are used at the most downstream point of a SuDS drainage system to throttle the flow. Where an orifice is less than 40mm it is typical to use silt and debris control upstream of the SuDS feature to prevnt blockage. Featu...
Silt Guard 300HD Series Silt Trap for 110/160mm Pipework with Filter Bucket
£389.00
The Siltguard range has been designed for the catchment and removal of silt and debris from the run off from impermeable and hard standing surface areas, such as: roofs, path and driveways, patios, car parks, roads and highways. Installation of a Siltguard as part of a SuDS design, will provide effective primary treatment for the surface water r...
Vortiflo Complete Vortex Flow Control Chamber 1050mm
£2,749.00
The new VORTIFLO 1050mm Flow Control Chamber range features the innovative new FlowBrake® Maxi - Vortex flow control, which is integrated into the outlet manifold of the chamber. The outlet manifold is also fitted with a Ø110mm overflow pipe, designed to operate in the unlikely event of blockage. The Flow Brake Maxi has been meticulously designe...
Oriflo Flow Control 600mm ø Chamber P Series
£849.00
**Flow rate and head must be provided via email upon purchase** The Oriflo range is a series of Orifice Flow Control Chambers accommodating a range of flow rates 600mm diameter, pre-assembled flow control chamber, delivered ready to install This model has a rotational moulded chamber base with 160mm, 225mm or 300mm main channel socket connectio...
GRAF tank dome extension piece
£199.00
GRAF tank dome extension piece, 600mm diameter available in: 90mm Height 285mm Height 610mm Height (100mm and 150mm connections available, 110mm default) These tank dome sections are suitable for: The Carat tank only.
FlowBrake Concrete Drainage Headwall 90 to 300m outlet
£149.00
Headwalls can be used in a number of scenarios. Typically headwalls are used on the outlet of a retention basin to maintain top water level or for a piped discharge point. The apron of the headwall prevents downstream erosion, whillst the upstand retains the earth behind the structure. Headwalls are designed to prevent the growth of plants arou...
Silt Guard SiltBlok 300 Series for 110mm & 160mm pipework
£379.00 £399.00
The New SILTBLOK 300 is an innovative and unique silt management product, designed and tested to filter out TSS (Total Suspended Solids), including silt to 30μm (0.03mm). The SILTBLOK’s core technology is extremely eco friendly, using a 100% recycled thermoplastic material, formed into a macro porous/micro porous block or (BLOK). This BLOK is th...
Accesso Catchpit Chamber - 600mm Diameter For 110/160mm and 225/300mm Twinwall Pipe
Accesso Catchpit Chamber - 600mm Diameter For 110/160mm and 225/300mm Twinwall Pipe
£479.00
600mm diameter – Factory built inspection chamber catch-pits, delivered to site as single piece units, ready to install, no assembly required. All chambers feature a robust, impact resistant, rota moulded base with moulded in pipe spigots. The main channel has several pipe options – 160mm EN 1401 as standard and 225mm and 300mm twinwall as optio...
Universal Filter 3 external suitable for pedestrian and vehicle loading
£449.00
For the majority of SuDS and rainwater applications pre filtration is required to remove silt and organic matter from the system to prevent blockage and poor performance. External filter to clean the rainwater before the tank Available for pedestrian loading and for vehicle loading 100 % water yield: therefore, ideal for smaller roof areas Filt...
Accesso Catchpit Chamber - 300mm Diameter For 110 and 160mm Pipe
£149.00
300mm diameter – Factory built inspection chamber catch-pits, delivered to site as single piece units, ready to install, no assembly required. This model has a rotational moulded chamber base with 110mm or 160mm main channel socket connections including two further 110mm side inlets at 90°, 270° from the outlet at 0°. Side inlets are supplied as...
Accesso Catchpit Chamber - 450mm Diameter For 150 and 225mm TwinWall Pipe
£279.00
450mm internal diameter - Factory built inspection chamber catch-pits, delivered to site as single piece units, ready to install, no assembly required. All chambers feature a robust, impact resistant, rota moulded base with four moulded socket connections. The main pipework connections, accommodate, both 225mm and 150mm twinwall pipe. There are ...
Accesso Catchpit Chamber - 450mm Diameter For 110 and 160mm Pipe
£279.00
450mm diameter – Factory built inspection chamber catch-pits, delivered to site as single piece units, ready to install, no assembly required. This model has a rotational moulded chamber base with 110mm or 160mm main channel socket connections including two further 110mm or 160mm side inlets at 90°, 270° from the outlet at 0°. Side inlets are su...
Mountable Vortex Flow Control FlowBrake Maxi
£899.00
The Vortiflo FlowBrake is designed to control the rate of water that passes through an attenuation tank, SuDS basin or SuDS pond. Its primary function is to slow down the flow rate of water, reducing the peak rate and ensuring a controlled release. The use of the Vortiflo FlowBrake downstream of an attenuation tank ensures that the release of st...
Silt Guard SiltBlok 500 Series for 150mm & 225mm pipework
£789.00
Our New SILTBLOK 500 is an innovative and unique silt management product, designed and tested to filter out TSS (Total Suspended Solids), including silt to 30μm (0.03mm). The SILTBLOK’s core technology is extremely eco friendly, using a 100% recycled thermoplastic material, formed into a macro porous/micro porous block or (BLOK). This BLOK is th...
Carat/Platin Calmed inlet and Siphon overflow package
£179.00
GRAF PLATIN / CARAT Calmed inlet and Siphon overflow package. This set is used to supplement underground tanks and consists of: - Calmed inlet which reduces disturbance of the settled sediment on the tank base - Siphon overflow which allows the tank to overflow to a drainage network or soakaway and prevents odours entering the tank
Graf Optimax Filter External
£549.00
For the majority of SuDS and rainwater harvesting applications pre filtration is required to remove silt and organic matter from the system to prevent blockage and poor performance. Features and Benefits: External filter to clean the rainwater before the tank Available for pedestrian loading and for vehicle loading Provides over 95 % water yi...
GRAF Universal-Filter 3 internal basket filter
£349.00
GRAF Universal-Filter 3 internal basket filter. Allows up to 100 % water yield Space-saving filter technology inside the tank The filter housing can be easily removed without tools Ideally suited when connecting the tank to a soakaway 275 mm offset height between inlet and outlet Can manage roof areas up to 350 m² Standard 100 mm connections Em...
GRAF Optimax-Pro-Filter internal Self Cleaning Filter
£429.00
GRAF Universal-Filter 3 internal basket filter. Provides over 95 % water yield Low maintenance (self-cleaning) Space-saving filter technology inside the tank Filter housing can be easily removed without tools Transparent lid for filter visibility Can manage roof areas up to 350 m² Standard 100 mm connections Self cleaning system available as a...
Drainstar settlement and screening inspection chamber
£539.00
For the majority of SuDS and rainwater applications pre filtration is required to remove silt and organic matter from the system to prevent blockage and poor performance. No height loss between inlet and outlet Offers both sediment settlement in the stilling chamber and screening Filter insert with mesh width of 0.35 mm Continuously variable ...
Accesso Catchpit Chamber - 1050MM Diameter For 150/225mm TwinWall Pipe
£1,539.00
This ACCESSO Catchpit features a durable rota moulded base with pipe sockets that connect to all UK - 150mm or 225mm twinwall pipe systems. The outlet also has a 300mm twinwall connection option . As well as the 225mm twinwall socket connections there are also two spigots for connection via 110mm EN 1401 pipe fittings . All inlet connections are...
Graf Opticlean Internal Sprayhead
£79.00
Rainwater harvesting systems require maintenance because of the build up of debris. The Opticlean cleaning unit provides 16 intense water jets for cleaning the Optimax Pro and Minimax Pro filter cartridge, keeping routine maintenance intervals to a minimum. The sprayhead can be activated with a manual valve, a sprinkler valve or automat...
Silt Guard SiltBlok 300 Series Top Entry for 110mm pipework
£269.00 £289.00
Using 100% recycled post-consumer plastic packaging material in the form of a thermoplastic macro porous block (BLOK) the BLOK filter is the core of the SILTBLOK product range. The filter has been designed and tested to filter out total suspended solids (TSS) including silt up to 30μm. The BLOK filter separates out the silt/TSS within the flow,...