Serving construction for 25 years

Catchpit Chambers for Silt Control in Surface Water Drainage & SuDS

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High quality sustainable water management products designed and manufactured in the UK

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WASP Catchpit Chambers

Catchpit Chambers provide an essential first line of defence within surface water drainage systems by capturing silt, sediment and debris before it enters downstream drainage infrastructure. Widely used in Sustainable Urban Drainage Systems (SuDS), attenuation tanks, geocellular storage systems and stormwater management networks, catchpit chambers help improve water quality, reduce maintenance requirements and protect critical drainage assets from blockage and premature failure.

Designed to intercept contaminants at source, catchpit chambers support effective surface water management by preventing the build-up of sediment within pipes, flow control chambers, attenuation systems and underground stormwater storage tanks. Their use can significantly reduce long-term maintenance costs whilst improving the hydraulic performance and operational efficiency of drainage networks.

Suitable for residential, commercial, industrial and infrastructure developments, WASP Catchpit Chambers form an important component of modern stormwater management and sustainable drainage systems. Engineered for durability and ease of maintenance, they help developers, contractors and civil engineers achieve planning compliance, protect drainage infrastructure and support effective flood risk reduction through improved sediment control and stormwater treatment.

A catchpit chamber, also known simply as a catchpit, is a structure used in drainage systems to capture and retain debris, sediment, and other solids from surface water runoff. They are normally installed upstream of an attenuation tank or attenuation pond to prevent blockages, reduce sediment build-up and improve the overall efficiency and longevity of the drainage system.

WASP catchpits are designed to separate and retain silt and other particles from stormwater, helping to protect the downstream drainage system and local environment. WASP catchpits are bespoke, watertight, structured wall chambers, manufactured to suit project-specific requirements and arrive to site ready to install.

Installation is quicker than traditional manhole chamber build techniques using manhole rings and the health and safety benefits become apparent during handling and installation, due to their strong, lightweight construction and integral lifting points.

Please contact SEL if you would like further information regarding any of the products below

Tel: 01254 589987 Email: sales@selenvironmental.com

surface water management

Key Benefits

Comply with

Sewers for Adoption (SfA8) 8th edition.
Suitable for Adoptable and Non-Adoptable applications.
Building Regulations - Part H1.
New Design & Construction Guidance – Section C7.1.1 Sediment Management.
Generally in accordance with BS EN 13598-2 but our chambers have a 300mm sump rather than a flow channel.

Prefabricated

Chambers are manufactured from adoptable standard pipework.
Easy access for collection and disposal of silt
Watertight, structured wall construction
One-piece installation
Strong and lightweight
Multiple inlet and outlet options
Ø1200+ Fitted step rungs to BS EN 13101

Easy to Install

Integral lifting points as standard
Depths to suit project-specific requirements
Supplied with integral spigot connections
Made from High-density Polyethylene (HDPE)
Wide range of diameters available
No concrete surround required

SURFACE WATER MANAGEMENT

WASP Catchpit Chambers Brochure

Download the latest WASP Catchpit Chamber brochure here

Product Information

WASP05050 Series 500mm Ø Chambers

The WASP05050 series catchpit chambers are a 500mm diameter (ID) Catchpit Chamber prefabricated to suit individual site requirements to a maximum height of 2500mm (including sump). Pipe connection spigots ranging from 110mmØ to 250mmØ (OD) are positioned to suit the manhole schedule. These chambers are supplied complete with a reduced access cover.

DOWNLOAD WASP05050 DATASHEET

WASP05100 Series 600mm Ø Chambers

The WASP05100 series catchpit chambers are a 600mm diameter (ID) Catchpit Chamber prefabricated to suit individual site requirements to a maximum height of 2500mm (including sump). Pipe connection spigots ranging from 110mmØ to 315mmØ (OD) are positioned to suit the manhole schedule. These chambers are supplied complete with a reduced access cover.

DOWNLOAD WASP05100 DATASHEET

WASP05250 Series 1200mm Ø Chambers

The WASP05250 series catchpit chambers are a 1200mm diameter (ID) Catchpit Chamber prefabricated to suit individual site requirements to a maximum height of 2500mm (including sump). Pipe connection spigots ranging from 110mmØ to 450mmØ (OD) and 500mmØ (ID) are positioned to suit the manhole schedule. These chambers are supplied with step irons as standard.

DOWNLOAD WASP05250 DATASHEET

WASP05300 Series 1350mm Ø Chambers

The WASP05300 series catchpit chambers are a 1350mm diameter (ID) Catchpit Chamber prefabricated to suit individual site requirements to a maximum height of 2500mm (including sump). Pipe connection spigots ranging from 110mmØ to 450mmØ (OD) and 500mmØ to 600mmØ (ID) are positioned to suit manhole schedule. . These chambers are supplied with step irons as standard.

DOWNLOAD WASP05300 DATASHEET

WASP05350 Series 1500mm Ø Chambers

The WASP05350 series catchpit chambers are a 1500mm diameter (ID) Catchpit Chamber prefabricated to suit individual site requirements to a maximum height of 2500mm (including sump). Pipe connection spigots ranging from 110mmØ to 450mmØ (OD) and 500mmØ to 600mmØ (ID) are positioned to suit manhole schedule. . These chambers are supplied with step irons as standard.

DOWNLOAD WASP05350 DATASHEET

WASP05400 Series 1800mm Ø Chambers

The WASP05400 series catchpit chambers are a 1800mm diameter (ID) Catchpit Chamber prefabricated to suit individual site requirements to a maximum height of 2500mm (including sump). Pipe connection spigots ranging from 110mmØ to 450mmØ (OD) and 500mmØ to 900mmØ (ID) are positioned to suit manhole schedule. . These chambers are supplied with step irons as standard.

DOWNLOAD WASP05400 DATASHEET