Underground Drainage

Underground Drainage – Reliable Solutions for Wastewater and Surface Water Management

Castings Drainage supplies plastic underground drainage products for managing foul water, surface water and stormwater below ground. The range includes below ground drainage pipes, fittings, gullies, inspection chambers and access components for domestic, commercial and civil engineering projects.

Underground Drain Systems Built to Last

Our underground drainage pipes are manufactured from PVC-U to EN 1401, the European standard for below ground drainage, and are supplied in 110mm and 160mm diameters in 3m lengths, plain ended or single socket. PVC-U handles soil pressure and chemical exposure without corroding, and a smooth internal bore keeps water flowing efficiently and reduces the risk of blockages.

Sizing and Access

110mm suits domestic foul and surface water runs. 160mm is used where flows are higher or the run is longer. Inspection chambers come in 320mm and 450mm diameters with 110mm and 160mm inlets, and riser sections build the chamber up to the depth of the run. Covers and frames are rated to 15kN for pedestrian and light duty areas.

Key Features

• PVC-U pipe manufactured to EN 1401
• Smooth internal bore for efficient flow and fewer blockages
• Corrosion and chemical resistant below ground
• Socketed and plain ended pipe for jointing into existing runs
• Sealing rings and riser sections for chamber build-up
• Lightweight sections for handling and installation

Browse Underground Chambers, Underground Pipes and Underground Fittings to find compatible components for a complete installation. For help selecting the correct sizes, connections or access products, contact us for technical advice and UK-wide delivery.