Backflow Preventer location for 2021 Outback 328 RL

[Joepr]

Where is the backflow preventer valve located in a 2021 Outback 328 RL? Have to replace it. Thanks.

[JRTJH]

Looking at your floorplan, I'd suspect it's under the vanity. Open the vanity door and count the PEX lines you see. If there's 2, then the valve is not under the vanity. If there's 4 lines (probably 1 blue/1 red and 2 white) then the valve is located at the "top of the white PEX lines" way up next to the faucet connections behind the sink bowl. PEX colors may vary, depending on what was available at the factory on the day your trailer went down the assembly line.

[Joepr]

Originally Posted by JRTJH

Looking at your floorplan, I'd suspect it's under the vanity. Open the vanity door and count the PEX lines you see. If there's 2, then the valve is not under the vanity. If there's 4 lines (probably 1 blue/1 red and 2 white) then the valve is located at the "top of the white PEX lines" way up next to the faucet connections behind the sink bowl. PEX colors may vary, depending on what was available at the factory on the day your trailer went down the assembly line.

I will look under the sink next time Im at the rig, however yesterday in the AM, during black tank dump, i connected the water hose to the black tank flush and turned on water. Water started coming out in the area below the panel where city water/tank/black tank flush connector is or left rear panel.

[sourdough]

Look under the sink as John suggested and hopefully (probably) it's there. On that trailer looks like they put the convenience center clear at the back away from your bath and kitchen. I assume because the fresh water tank is back there. I've had the backflow quit and it just blew back water from the hose connection. In your case, once you fix it, you might check the connections behind that convenience center box and make sure everything is tight. I would expect if the pressure backed up to a loose connection behind that box it would leak out right where you said.