Device for temporarily rinsing a water cock sunk in the ground.

摘要

The invention relates to a device for temporarily rinsing a water cock countersunk in the ground and being extensible by means of an extension piece in conjunction with a closing member above the ground. …The invention has for its object to provide a device which fully automatically conducts away the dirt accumulated in the area of the valve without the risk of dirt getting into the water mains. To this end the invention provides a device of the type referred to in the preamble which comprises a drain pipe connectable between the water cock and the closing member of the extension piece, said pipe including a valve body closing the drain pipe with a delay by the water pressure prevailing in the extension piece when the water cock is opened.