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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
Oriflo Protected Flow Control 1050mm Ø Chamber C Series
£2,699.00
**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), integrated into the barrier plate providing protection to the or...
Carat/Platin Calmed inlet and Siphon overflow package
£259.00
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
£342.00 £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 ...
SuDS Greenfield Runoff Flow Calculation
£120.00
The Greenfield runoff calculation estimates the peak flow rate of surface water runoff that naturally flows off an undeveloped land during rainfall events. Once an application to develop the land is submitted, the Regulatory Authorities such as the Lead Local Flood Authorities, Local Planning Authorities and Water Authorities typically request ...
SuDS Construction Phase Plan
£180.00
A SuDS Construction Phase Plan provides the operational blueprint required by site managers, developers, and Local Authorities to manage surface water and pollution risks safely during construction. The Construction Phase plan covers: Silt & Runoff Mitigation: Prevents sediment-laden water from leaving the site, clogging public sewers, or...
SuDs Proforma Completion
£240.00
A SuDS Proforma is a checklist required by certain Local Planning Authorities to demonstrate that a new development handles surface water safely and sustainably. To complete the SuDS proforma, we require the following information: Proposed & Existing Site Layouts (CAD/PDF). Topographical Survey. Flood Risk Assessment (FRA) or Drainage Stra...
SuDS Maintenance & Management Plan
£180.00
Our SuDS Maintenance & Management Plans provide developers, contractors, and site owners with practical, tailored schedules that keep drainage systems performing as designed throughout their lifecycle. We create structured maintenance plans covering all key SuDS components, including: Attenuation Tanks Soakaway systems Attenuation ponds an...
Sewer Connection Requests for SuDS & Drainage Projects
£360.00
When building a new property, extending an existing one, or changing a drainage layout, approval for a new sewer connection is required before proceeding. We can manage the application process, helping to ensure the project meets the requirements of the Local Water Authority. We require the following information in order to proceed with the requ...
Flowbrake Complete Vortex Flow Control Chamber 1200mm
£2,669.00
The 1200mm 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 non-return valve and emergency by-pass kit, and overflow pipe designed to operate in the unlikely event of blockage. The Flow Brake Maxi h...
Comparative SuDS Rainwater Attenuation Sizing Design Calculation
£300.00
This express calculation service is intended for architects, builders, developers, engineers, and other construction professionals who are able to provide the required information in the format requested below. To ensure an accurate and efficient calculation, all relevant input data must be clearly supplied at the time of submission. If you or y...
Saphir Universal Shaft
£659.00
GRAF SAPHIR universal shaft, available in 600, 900 and 1200mm diameters. Ideal for housing pumps underground. Mounting and Maintenance Instructions 600l Drawing 900l Drawing 1200l Drawing
FlowBrake Concrete Drainage Headwall 600mm outlet
£2,989.00
*Pipework diameter in mm required Lead time is 4-6 weeks A one-piece reinforced concrete headwall for up to 600mm diameter twinwall pipe or 450mm concrete pipe. Available in three standard heights, 1m, 1.5m and 2m, with the RD20 lifting points cast in, and toe available in 300mm or 700mm sizes. Stainless steel sockets are provided for the attach...
Accesso Surface Water Inspection Chamber - 450mm Diameter For 150 and 225mm Twinwall Pipe
Accesso Surface Water Inspection Chamber - 450mm Diameter For 150 and 225mm Twinwall Pipe
£329.00
Our extensive Accesso range is a series of high strength plastic inspection chambers and catchpit chambers all delivered ready to install. Covering both Foul and Surface water systems, Accesso is a range of injection moulded and rotational moulded chambers designed to be compatible with a vast selection of water systems to suit your requirement...
Silt Guard SiltBlok 600 Series
£1,279.00
The SILTBLOK SB600B is an advanced silt trap model within the SILTBLOK range, designed to deliver superior filtration and hydraulic control in surface water management systems. The unit features a Ø600mm rotationally moulded chamber base, accommodating 225mm or 150mm twinwall main channel connections, with additional 110mm twinwall side inlets p...
Accesso Catchpit Chamber - 1050MM Diameter For 300/450mm TwinWall Pipe
£1,809.00
This Accesso catchpit chamber has a Ø 1050mm rotational moulded chamber base with 300mm or 450mm main channel socket connections, it also includes two further 300mm side inlets at 90° and 270° from the outlet at 0°, which are provided as blanked ends for use as required. This catchpit chamber is available in 5 different models; as the base alone...
Silt Guard 500 Series Silt Trap for 160-225mm Pipework with Filter Bucket and Access Cover
Silt Guard 500 Series Silt Trap for 160-225mm Pipework with Filter Bucket and Access Cover
£599.00
525mm diameter, factory built unit, delivered to site ready to install. Featuring a robust, impact resistant, rota moulded body with moulded pipe spigots that accommodate 160mm EN 1401 pipe fittings. There is an option of Ø225mm twinwall pipe connections (See Model: SS500225). Integrally there is a removable silt basket under the inlet. The bask...
Accesso Surface Water Inspection Chamber - 600mm Diameter For 300mm and 225mm Twinwall Pipe
Accesso Surface Water Inspection Chamber - 600mm Diameter For 300mm and 225mm Twinwall Pipe
£619.00
This Accesso inspection chamber has a Ø 600mm rotational moulded chamber base with 300mm main channel socket connections, it also includes two further 225mm side inlets at 90° and 270° from the outlet at 0°, which are provided as blanked ends for use as required. This inspection chamber is available in 6 different models; as the base alone, or w...
Accesso Catchpit Chamber - 600mm Diameter For 150-225mm 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 two pipe options – 150mm and 225mm twinwall, both these come with rocker pipe connecti...
Plug & Drain Submersible Flood Pump– Emergency Kit for draining floodwater
£569.00
PLUG & DRAIN is the indispensable and practical emergency kit for tackling flooding in garages, cellars and basements with efficacy and speed. Thanks to the versatile drainage pump and the 15 metres long PVC hose it is possible to swiftly drain the flooded area, if necessary using the plastic crate as a filter. With PLUG & DRAIN you can ...
GRAF Optimax-Pro XL-Filter internal Self Cleaning Filter
£959.00
GRAF Universal-Filter 3 internal basket filter. No external pre-filtration necessary therefore no additional cover visible High efficiency even during heavy rainfalls Collection from several roof surfaces possible Provides over 95 % water yield Low maintenance (self-cleaning) Sieve insert mesh width 0.35 mm (0.01") Space-saving filter technolog...
GRAF Minimax-Pro Filter Internal Self Cleaning Filter
£469.00
GRAF Universal-Filter 3 internal basket filter. Provides over 95 % water yield Self cleaning filter Space-saving filter technology inside the tank Can manage roof areas up to 350 m² Standard 100 mm connections Optional with cleaning unit internal Sieve insert mesh width 0.35 mm (0.01") Only 80 mm (3.2") height offset between the inlet and outle...
GRAF Universal-Filter 3 XL internal basket filter
£379.00
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 Can manage flows up to 16l/s (~700m2 @0.022 l/s/m2) Standard 150 mm connections Emergency overflow system avai...
Sedimentation filter shaft, suitable for pedestrian loading
£1,089.00
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. 3-stage cleaning process- Fine filter basket (0.35 mm mesh width)- Sedimentation zone- Submerged pipe as oil separator Low installation depth from 1,000 – 1,500 mm using tel...
SuDS drainage Infiltration filter shaft
£569.00
Ideal as yard inlet, swale or SuDS infiltration inlet upstream element. Retains impurities that could have a negative effect on infiltration performance and/or downstream receptor site. 3-stage cleaning process- Coarse filter insert- Fine filter basket (0.35 mm mesh width)- Sedimentation zone For roof surfaces up to 1,200 m² Continuously var...
Universal Industrial Filter 3 - High Flow
£1,289.00
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. For roof surfaces up to 1,200 m² Continuously variable installation depth of 703 - 1,270 mm (26.7-50.0") using the telescopic dome shaft Maximum roof surface area of 750 m² wi...