Hydrant emptying system comprises pipe which passes through base of hydrant and base of sealing sleeve mounted in it, sleeve forming watertight seal with plate which resting on pipe when it is raised

摘要

The hydrant emptying system comprises a pipe (12) which passes through the base (19) of the hydrant and the base (22) of a sealing sleeve (4) mounted in it. When the sleeve is raised it forms a watertight seal with a plate (20) which rests on the top of the pipe.