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Old 06-17-2013, 06:30 AM   #1
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San-T-Flush Valve

About 6 months ago the check valve started to leak. Ordered and installed a new one. Noticed a leak...out the top.....in the new one. But under strange conditions.
We camp for extended periods at the same places so dump and flush often without moving. This allows keeping the hose connection to the flush system connected. After a flush I turn off the water...but there is still pressure to the valve. This is when it slowly leaks. If I disconnect the hose...or relieve the pressure...no problem.
The obvious solution is disconnect the supply hose...but. Wondering if anyone had a similar problem.

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Old 06-17-2013, 10:13 AM   #2
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IMHO most people with flush valves like this do not keep them connected when they are not being used. There is the potential for disaster if something or someone caused water to flow into your black tank with you not being aware of it. Even a slight leak at the spigot could, over time, cause your tank to fill and eventually overflow.

Furthermore, several states have enacted plumbing codes which prohibit simultaneous connection of hoses to both drinking water and sewers for fear of cross contamination. Even though the check valve is supposed to prevent that from happening, I have encountered RV parks that are sensitive to the subject of having their water system in any way connected to a black water tank. Leaving the hose connected all the time is a "flag" which I prefer not to raise.

I leave my flushing hose connected to a "Y" adapter at the spigot and find it handy for watering plants, etc. I normally only need to flush the black tank every 5-6 days and I don't think it's that big a deal to connect to the San-T-Flush fitting when I do.

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Old 06-17-2013, 10:18 AM   #3
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I did have to have my valve replaced because it leaked, but I never saw the symptoms you're seeing.

As mentioned, I never leave the hose connected for fear that some kid would turn on the water to it and we'd find a mess.

Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

2007 Itasca Ellipse 40FD
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Old 06-17-2013, 10:43 AM   #4
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Point well made.....will alter my method of flushing immediately.
Thanks for the input
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