Valterra 45 Degree Hydroflush Attachment with Removable Anti-Siphon Valve for RV, Camper, Trailer -F02-4100

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SEWER TANK RINSER: Breaks up plugged tanks and cleans tank, pipe, valve, drain hose
FUNCTIONAL: Internal backflow preventer and removable anti-siphon valve protect the fresh water supply from possible backflow

Amazon.com Price:  $25.58 (as of 27/11/2022 09:46 PST- Details)