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Plastic Underground Drainage
Our Plastic Underground Drainage range is designed for dependable, long-lasting water management below ground. Ideal for new builds, extensions and repair work, plastic underground drainage systems provide a practical solution for carrying waste and surface water safely away from properties. With durable pipework and compatible fittings, these systems are built to perform in ground conditions while remaining straightforward to install.
Plastic underground drainage is commonly used for connecting soil and waste outlets, rainwater runs and underground pipe networks, helping prevent pooling, damp issues and water build-up around buildings. Plastic pipework offers consistent sizing, easy handling and secure jointing, making it a popular choice for both trade professionals and home improvement projects. Using the correct connectors, bends and access fittings ensures a watertight finish and helps reduce future maintenance.
For best results, plan your route carefully, maintain the correct fall for steady flow, and install on a suitable bed with proper backfill to protect the pipework. Whether you’re replacing a section or installing a full system, choosing compatible components helps deliver a tidy, reliable drainage run.
Shop online today for plastic underground drainage pipes and fittings with convenient ordering and delivery available.
160mm x 45 deg Single Socket Bend
Brett Martin 160mm x 45° Single Socket Bend is a heavy-duty PVCu underground drainage fitting designed to change the direction of 160mm drainage pipework. Manufactured to British Standards, it provides a reliable push-fit connection for foul water and surface water drainage systems.
£20.38 INC VAT
160mm x 6m Single Socket Pipe
Brett Martin 160mm x 6m Single Socket Pipe is a heavy-duty PVCu underground drainage pipe designed for high-capacity foul water and surface water systems. Manufactured for strength and durability, it offers efficient wastewater flow and simple push-fit installation with an integrated single socket connection.
£56.25 INC VAT
160mm x 87 1/2 deg Double Socket Bend
Brett Martin 160mm x 87.5° Double Socket Bend is a heavy-duty PVCu underground drainage fitting designed to create a near-vertical change in direction in 160mm drainage pipework. Featuring double socket push-fit connections and manufactured to British Standards, it provides a reliable solution for foul water and surface water drainage systems.
£25.02 INC VAT
160mm x 87 1/2 deg Single Socket Bend
Brett Martin 160mm x 87.5° Single Socket Bend is a heavy-duty PVCu underground drainage fitting designed to create a near-vertical change in direction in 160mm drainage pipework. Manufactured to British Standards, it provides a secure push-fit connection for foul water and surface water drainage systems.
£21.03 INC VAT
225mm x 45 deg Double Socket Bend
The Brett Martin 225mm Twinwall 45° Double Socket Bend is a twinwall drainage fitting designed to create a swept 45° direction change in 225mm underground surface water and land drainage systems. Double socket ends enable quick connection to compatible twinwall pipes.
£73.11 INC VAT
225mm x 45 deg Triple Socket Equal Branch
The Brett Martin 225mm Twinwall 45° Triple Socket Equal Branch is a high-capacity twinwall drainage branch fitting designed to form a swept 45° junction in 225mm twinwall surface water systems. Triple socket ends provide secure, reliable connections for underground drainage networks.
£198.85 INC VAT
225mm x 90 deg Double Socket Bend
The Brett Martin 225mm Twinwall 90° Double Socket Bend is a heavy-duty twinwall drainage fitting for forming right-angle direction changes in 225mm underground surface water and land drainage systems. The double socket design supports secure, stable connections on site.
£75.79 INC VAT
225mm x 90 deg Triple Socket Equal Branch
The Brett Martin 225mm Twinwall 90° Triple Socket Equal Branch is a high-capacity twinwall drainage junction designed to form a right-angle 90° branch connection in 225mm underground surface water systems. Triple socket ends support secure connections for large drainage networks.
£198.85 INC VAT
280mm Dia. 90 deg Chamber Base (205mm Invert)
The Brett Martin 280mm Dia. 90° Chamber Base (205mm Invert) is a compact inspection chamber base designed for shallow underground drainage installations. Featuring a 90° channel and 205mm invert, it supports efficient flow direction changes while providing access for maintenance.
£31.70 INC VAT
280mm Dia. Shallow Access Chamber (205mm Invert) inc. 2 Socket Plugs
The Brett Martin 280mm Dia. Shallow Access Chamber (205mm Invert) including 2 Socket Plugs is a compact inspection chamber solution for 110mm drainage systems. Designed for shallow installations, it provides convenient access for inspection and maintenance while supporting secure sealing of unused entries.
£31.70 INC VAT
280mm Dia. Shallow Access Chamber Square Double Seal Lid (Pedestrian)
The Brett Martin 280mm Shallow Access Chamber Square Double Seal Lid (Pedestrian) is a secure sealed cover designed for pedestrian areas. Featuring a double seal design to help reduce odours and water ingress, it provides a neat finished top for 280mm shallow access chambers.
£45.42 INC VAT
280mm Dia. Shallow Access Riser (185mm Invert)
The Brett Martin 280mm Dia. Shallow Access Riser (185mm Invert) is an extension section designed to increase the height of compatible 280mm shallow access chambers. Ideal for matching finished ground levels, it supports a tidy installation and reliable chamber access.
£19.83 INC VAT
300mm Dia. x 600mm Invert Trapped Yard Gully x 110mm
The Brett Martin 300mm Dia. x 600mm Invert Trapped Yard Gully (110mm Outlet) is a high-capacity trapped gully designed for external yard drainage. Featuring an invert trap to help reduce odours and debris transfer, it provides dependable surface water collection and discharge into 110mm underground drainage systems.
£36.78 INC VAT
300mm x 45 deg Double Socket Bend
The Brett Martin 300mm Twinwall 45° Double Socket Bend is a twinwall drainage fitting designed to create a swept 45° change of direction in 300mm underground surface water systems. Double socket ends support quick installation and reliable jointing on large drainage schemes.
£133.35 INC VAT
300mm x 45 deg Triple Socket Equal Branch
The Brett Martin 300mm Twinwall 45° Triple Socket Equal Branch is a heavy-duty twinwall drainage junction designed to create a swept 45° branch connection in 300mm underground surface water drainage systems. With triple socket ends, it supports stable connections in large-capacity drainage networks.
£306.07 INC VAT
315mm Dia Shallow Access Chamber Riser (185mm Invert)
The Brett Martin 315mm Dia Shallow Access Chamber Riser (185mm Invert) is an extension section for increasing the height of compatible 315mm shallow access chambers. Ideal for aligning to finished ground levels, it supports a tidy chamber installation and reliable access.
£19.74 INC VAT
315mm Dia. Shallow Access Chamber Base 190mm Invert (Inc. 2 Socket Plugs)
The Brett Martin 315mm Dia. Shallow Access Chamber Base (190mm Invert) including 2 Socket Plugs is a compact inspection chamber base designed for shallow drainage systems. Supplied with socket plugs for flexible connections, it supports reliable access for inspection and maintenance.
£33.32 INC VAT
315mm Dia. Shallow Access Chamber Sealed Lid (Driveway) 35kN*
The Brett Martin 315mm Dia. Shallow Access Chamber Sealed Lid (Driveway) 35kN is a heavy-duty sealed chamber cover designed for driveway applications. Rated to 35kN, it helps reduce odours and ingress while providing secure access for inspection and maintenance.
£52.85 INC VAT
315mm Dia. Shallow Access Chamber Sealed Lid (Pedestrian)
The Brett Martin 315mm Dia. Shallow Access Chamber Sealed Lid (Pedestrian) is a sealed cover designed for pedestrian areas, helping reduce odours and limit water ingress. Suitable for 315mm shallow access chambers, it provides a neat finished top for patios, paths and landscaped drainage access points.
£46.75 INC VAT
450mm Dia. Chamber Base (225mm Invert) (Inc. 3 Socket Plugs) 110mm
The Brett Martin 450mm Dia. Chamber Base (225mm Invert) with 3 Socket Plugs – 110mm is a versatile inspection chamber base for 110mm drainage systems. Supplied with socket plugs for unused inlets, it supports flexible chamber configuration with reliable access for maintenance.
£33.91 INC VAT
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