UK Plumbing & Electrical News

110mm soil pipe is the black or grey pipe that carries waste from toilets, and the soil and vent stack on multi-storey buildings and extensions.

Soil pipe carries the waste from WCs, urinals, and any appliance with a high risk of sewage contamination directly to the underground drain — without any of the intermediate traps.

The soil and vent pipe (SVP) is the backbone of any above-ground drainage system. It carries foul water from WCs, baths, showers, and basins to the underground drainage network, while simultaneously venting the stack to prevent siphonage of trap water seals. A guide for plumbers on soil stack design, branch fitting types, Part H compliance, and common installation errors.