Keystone RV Forums - View Single Post - 22RBS Black Tank Back Flow/Anti Siphon Location

**chuckster57** · 04-06-2018, 03:21 PM

Any RV that has a factory installed black tank rinser will have an anti siphon valve. It’s location isn’t always the same, I’ve seen them under the bathroom sink, behind the shower wall, even in a cabinet with lots of other fresh water lines.

They are there to insure the fresh water system your hooked up to doesn’t get contaminated. As long as there is an anti siphon device between the black tank and the rinse water source, your good.

04-06-2018, 03:21 PM	#16
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,317	Any RV that has a factory installed black tank rinser will have an anti siphon valve. It’s location isn’t always the same, I’ve seen them under the bathroom sink, behind the shower wall, even in a cabinet with lots of other fresh water lines. They are there to insure the fresh water system your hooked up to doesn’t get contaminated. As long as there is an anti siphon device between the black tank and the rinse water source, your good. __________________ 2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel. Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS. Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.