Drainage Services in Caerphilly

Caerphilly grew up around its castle and moat on relatively flat ground at the mouth of the Aber and Rhymney valleys, surrounded by steep terraced streets climbing the hillsides. Older terraces have Victorian and early-twentieth-century clay drainage, often combined systems, laid to follow the contour of the hill, while post-war estates and newer developments on the town's edges use separate foul and surface water systems in plastic pipe.

The surrounding valley geology is largely Coal Measures sandstone and mudstone, and steep gradients mean surface water can move quickly during heavy rain, putting pressure on older combined sewers in the lower town near the castle moat. Historic mining activity in the wider area has occasionally caused ground movement that affects older pipe runs, particularly in streets built directly onto the hillside.

We begin with a CCTV survey to check pipe condition and gradient on these steep terraced runs before recommending any work. High-pressure jetting is effective on the silt and debris that steep gradients wash into drains, and where clay pipes have cracked or moved due to ground settlement we use no-dig relining to repair them without digging up gardens or steep access paths.