Patent ID: 6170514
Filing Date: 2001-01-09
Classification: B01D,B08B,E03B,F15B,F16K,Y10T

Abstract:
For use with a city water system having a plurality of street water mains interconnected by branch water mains and having hydrants connected to the branch water mains, a city water flushing and sludge prevention apparatus comprising:(a) a sludge-prevention control valve insertable into a branch water main between two street water mains and closer to one of the two street water mains;(b) said sludge-prevention control valve in the closed position preventing water from flowing through the branch water main from the closer street water main during a flushing operation, whereby all water flows through the branch water main from the more distant street water main and thereby flushes the portion of the branch water main between said sludge-prevention control valve and the more distant street water main, the sludge exiting the branch water main through an open hydrant; and(c) a control mechanism adapted to close and open said sludge-prevention control valve.