Thetford 94239 Fresh Water Vacuum Breaker/Check ValveThe Thetford Fresh Water Vacuum Breaker stops bacteria and waste from getting into your freshwater hose or RV water supply. Installs between your water inlet connection and tank flusher.Factory Tested: Factory tested for zero leakageLB&B Molders: Cross-reference number 571-VAC-CHK-A.Standards: Meets IAPMO standardsNote: Must be installed 6″ above flood rim of the highest fixture connected to your water system.Additional InformationDimensions2.5″H x 6.9″L x 4.9″WPressure Range8 – 125 PSI (Pounds per sq. in.)MaterialPlasticColorBlack