Cracks come from ground movement, tree root pressure, vehicle loads, age and brittle materials. On CCTV footage they are classified by direction and severity: circumferential (around the pipe), longitudinal (along it) and multiple/spiderweb fracturing, which signals advanced failure.
A cracked pipe still flows, which is why cracks often go unnoticed until roots find them. Relining or patching seals cracks permanently if caught before deformation sets in.
A defect term for wall fractures short of full collapse.
Anywhere, especially clay pipes near trees, under driveways and in reactive soils.
A CCTV drain inspection is the standard way to confirm whether this is what's happening in your pipes: the camera shows the condition on screen, a locator pinpoints the exact position and depth, and you get a recorded report before any repair decisions are made.
A CCTV drain inspection shows exactly what's happening inside your pipes — no guesswork.