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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.
150mm x 45 deg Triple Socket Equal Branch
The Brett Martin 150mm Twinwall 45° Triple Socket Equal Branch is a twinwall drainage junction fitting used to create a 45° branch connection in 150mm twinwall surface water and land drainage systems. With triple socket ends, it supports secure connections and efficient routing.
£82.00 INC VAT
150mm x 90 deg Double Socket Bend
The Brett Martin 150mm Twinwall 90° Double Socket Bend is a durable twinwall drainage fitting designed to change direction in 150mm corrugated twinwall surface water and land drainage systems. Featuring double socket connections, it provides a secure, reliable joint for underground drainage installations.
£49.53 INC VAT
150mm x 90 deg Triple Socket Equal Branch
The Brett Martin 150mm Twinwall 90° Triple Socket Equal Branch is a twinwall drainage junction fitting designed to create a 90° branch connection in 150mm twinwall surface water and land drainage systems. Triple socket ends provide secure connection points for efficient underground drainage layouts.
£82.00 INC VAT
160mm Double Socket PVC (BS) Coupler
Brett Martin 160mm Double Socket PVC (BS) Coupler is a durable underground drainage fitting designed to connect two plain-ended 160mm drainage pipes. Manufactured from high-quality PVCu and compliant with British Standards, it provides a secure and watertight joint for foul water and surface water drainage systems.
£19.97 INC VAT
160mm Rodding Point Socketed And Sealed
The Brett Martin 160mm Rodding Point Socketed and Sealed is a PVCu underground drainage access fitting designed to provide rodding entry into 160mm drainage systems. With a socketed, sealed design, it supports watertight performance while improving system maintainability.
£110.15 INC VAT
160mm Socket Plug
The Brett Martin 160mm Socket Plug is a PVCu underground drainage accessory designed to blank off a 160mm socket opening securely. Ideal for unused outlets and future connections, it supports watertight integrity in foul and surface water drainage systems.
£34.98 INC VAT
160mm Spare Plug (Chamber)
The Brett Martin 160mm Spare Plug (Chamber) is a replacement blanking plug designed for compatible inspection chambers and chamber bases. Used to seal unused 160mm entries, it supports flexible configurations while helping maintain watertight chamber integrity.
£7.63 INC VAT
160mm Square Alloy Grid
The Brett Martin 160mm Square Alloy Grid is a durable metal grid cover designed for compatible 160mm square hopper and gully tops. Providing a strong, neat finish, it supports reliable surface water entry while improving durability in external drainage areas.
£11.42 INC VAT
160mm Square Alloy Sealing Plate
The Brett Martin 160mm Square Alloy Sealing Plate is a durable cover plate designed to seal compatible 160mm square hopper or gully tops. Ideal for temporarily or permanently blanking an opening (application dependent), it helps protect drainage connections and maintain a tidy finish.
£39.56 INC VAT
160mm Square Hinged Alloy Grid
The Brett Martin 160mm Square Hinged Alloy Grid is a robust metal grid cover designed for compatible 160mm square hopper and gully tops. With a hinged design for easier access, it supports maintenance-friendly external drainage installations.
£38.50 INC VAT
160mm Square Plastic Grid
The Brett Martin 160mm Square Plastic Grid is a lightweight, practical grid cover designed for compatible 160mm square hopper and gully tops. Offering a neat finish and reliable surface water entry, it’s ideal for domestic external drainage applications.
£3.66 INC VAT
160mm x 11 1/4 deg Single Socket Bend
Brett Martin 160mm x 11.25° Single Socket Bend is a heavy-duty PVCu underground drainage fitting designed to create a slight directional adjustment in 160mm drainage pipework. Manufactured to British Standards, it provides a secure push-fit connection for foul water and surface water drainage systems.
£28.84 INC VAT
160mm x 110mm Square Hopper
The Brett Martin 160mm x 110mm Square Hopper is a surface water intake hopper designed to channel rainwater run-off into 110mm underground drainage. With a compact 160mm square top and practical 110mm outlet compatibility, it delivers a neat, efficient external drainage inlet.
£26.68 INC VAT
160mm x 110mm x 45 deg Double Socket Branch
The Brett Martin 160mm x 110mm x 45° Double Socket Branch is a PVCu underground drainage fitting used to connect a 110mm branch into a 160mm drain at a swept 45° angle. Double socket push-fit ends provide fast installation with secure, watertight performance.
£37.58 INC VAT
160mm x 110mm x 45 deg Triple Socket Branch
Underground Drainage Branch – 160mm – 110mm. Connect multiple pipe runs within a below-ground drainage system.
£38.61 INC VAT
160mm x 110mm x 87 1/2 deg Double Socket Branch
The Brett Martin 160mm x 110mm x 87.5° Double Socket Branch is a PVCu underground drainage junction fitting that connects a 110mm branch into a 160mm main line. Featuring double socket push-fit connections and a near-vertical 87.5° branch, it supports secure, watertight foul and surface water installations.
£37.58 INC VAT
160mm x 110mm x 87 1/2 deg Triple Socket Branch
The Brett Martin 160mm x 110mm x 87.5° Triple Socket Branch is a PVCu underground drainage junction for connecting a 110mm branch into a 160mm system. With triple socket push-fit ends and an 87.5° branch, it offers a secure, watertight connection for foul and surface water drainage.
£38.61 INC VAT
160mm x 111/4 deg Double Socket Bend
Brett Martin 160mm x 11.25° Double Socket Bend is a heavy-duty PVCu underground drainage fitting designed to create a slight directional change 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.
£34.34 INC VAT
160mm x 160mm Square Hopper with 110mm Solvent Socket
The Brett Martin 160mm x 160mm Square Hopper with 110mm Solvent Socket is a surface water collection hopper designed for high-capacity intake with a secure solvent-weld connection to 110mm pipework. Ideal for rainwater and site drainage, it provides a neat square-top finish and reliable discharge.
£18.84 INC VAT
160mm x 160mm x 45 deg Double Socket Branch
The Brett Martin 160mm x 160mm x 45° Double Socket Branch is a PVCu underground drainage junction used to connect a 160mm branch line into a 160mm run at a swept 45° angle. Double socket push-fit connections deliver a secure, watertight fit for foul and surface water systems.
£41.62 INC VAT
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