Quote:
Originally Posted by CSimon
I have a 2016 Fourwinds 31W. The built in flush out system has never worked since Purchased. Dealer said he could schedule me in end of May. When I connect the hose to the flush out it stays under pressure with the dump valves open. Traced out the plumbing which goes across and goes up through the floor seems to be behind the sink cabinet. It seems as if there could be a valve closed but could not confirm what's behind the cabinet. Before I pull out the cabinet, Does anyone know if they would put a valve in the flush out line.  |
Depending on the black tank flush system you could have a back flow preventer and a vacuum breaker/check valve. My prior class C had both with the check valve being located in the line located in the bathroom sink cabinet. Turned out the issue I had on that coach was not the check valve but rather the jets on the nozzle were so small they would plug up and the pressure would cause the check valve to close. The solution was to remove the nozzle from the tank and drill out the jet 1/32 larger than stock. Never had a problem after that.
Here is a link to the check valve on Amazon.
https://www.amazon.com/JR-Products-5.../dp/B0095TD5S6
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