Vacuum Valve 16mm 5/8"

Vacuum valve with 16mm (5/8") hose connections. Acts as siphon breaker to prevent water intrusion through sea water intake with severe damage as result. Installed above water line between heat exchanger and the exhaust hose. Non corrosive, proven design made of tough thermoplastic with rubber valve. Easy to install. Interchangeable with Volvo Penta 21662701 (replaces old 827952, 828271, 828537, 833685, 833687, 838154, 838207), Johnson Pump 09-47316-02.