Camco 40123 Quickie Flush with Back Flow PreventerCamco
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Camco RV Quickie Flush with Back Flow Preventer helps to thoroughly flush the holding tank without bringing a hose through the window. A permanently installed built-in backflow preventer helps to keep sewage from contaminating water line. Hook garden hose to the connection (outside RV) and flush for 2 minutes or until water runs clear.