Every fixture connects to the drain through a trap — most commonly the P-trap, whose horizontal outlet suits wall connections. The water seal (typically at least 50 mm deep in Australia) is the only thing standing between your bathroom and the sewer's atmosphere.
Seals are lost by evaporation in unused fixtures, siphonage from poor venting, or leaks — all announced by that unmistakable drain smell.
Maintains a water seal between each fixture and the drainage system.
Under every sink, basin, shower, bath and floor waste.
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.