Double check valve backflow preventer assembly

摘要: A backflow preventer assembly for a liquid supply line includes single unitary valve body including flanged inlet and outlet end openings access opening generally normal to the flow path defined by openings. The houses pair of check seats on opposite sides seating valves mounted in series permit from Adjustable compression rods interconnecting two seat against their oppositely facing seats. are sized enable installation removal through opening. In one embodiment has predetermined length between gate assemblies, such being same as standard assembly. second embodiment, incorporates, addition housings each assemblies so that can incorporate, unit, complete double valves.