Glossary

1. Lightweight concrete which is placed on roofs or floors to promote drainage. 2. A base course of granular material […]

A castiron, threaded fitting, used on drainage pipes; has a shoulder such as to present a smooth, continuous interior surface.

An opening in a construction which permits unwanted water to drain away, e.g., from behind a retaining wall.

The piping network within a structure which conveys sewage, rainwater, or other wastes from their point of origin to a

Brit. draining board A work surface, adjacent to a sink, having a built-in pitch so that it drains into the

A small cock or faucet, at the lowest point in a tank, for draining off the liquid.