A soil stack collects fixture discharges on each level and drops them to the building's drain. Its upper end usually extends through the roof as a vent, balancing air pressure so falling water cannot siphon the water seals out of fixture traps.
In older buildings stacks are often cast iron or galvanised steel, and internal corrosion or joint failure inside walls can be expensive to access — making relining an attractive repair.
Carries multi-level wastewater downward and vents the drainage system.
Inside service shafts and walls of two-storey homes, units and commercial buildings.
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.