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

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

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

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

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

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

The materials which completely surround a pipe, providing support and/or protection.