Office Cassette Leaked After Relocation: Hose Kinked

Water at a unit shortly after it was relocated, on pipework that is new along the whole run. The line tests clear from both ends. Nothing was reported as difficult during the move.

New pipe that has never carried a blockage, testing clear from both ends, still fails to pass water. That combination points at the shape of the run instead of at its contents. Flexible pipe pushed round a tight corner flattens rather than bending, and the restriction it creates is invisible from either end because nothing stops a rod or a probe. The run has to be followed by hand.

Flexible drain pipe holds whatever shape it is pushed into. Forced round a corner tighter than it allows, the wall collapses inward and the bore closes to a fraction of its size. Water still passes, just far more slowly than the unit produces it, so the pan fills over an hour rather than backing up at once. A rod goes through the flattened section without difficulty, which is why testing finds nothing.

Easing the bend and supporting the pipe so it holds its shape is the repair. Where there is no room to make that turn properly, the section gets rerouted instead. On any relocation the whole new run is worth following by hand before the ceiling closes, because a kink is easy to feel and impossible to see once it has been covered over.