Drain Jetting Harpenden =link= Guide

Avoid “no CCTV, no survey” cheap offers (£80–100). They may clear the symptom but miss a collapsed pipe – common in Southdown’s 1960s clay sewers.

Professional jetters don’t just use pressure – they use . A 3,000 psi jet with 20 L/min creates a scouring velocity of ~7 m/s in a 100mm pipe, which lifts heavy sediment (chalk grit, gravel) common in Harpenden surface water drains. drain jetting harpenden