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Valve

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Joel Weiss:
Actually, having it on a tank flush system would make sense.  Even though your Sanicon is more complex than the tank flushing system on our coach, I assume the same basics apply.  When I disconnect the hose from the flushing connector only clean water comes out because there is a vacuum breaker in the system which prevents nasty stuff from coming back out.

If you've done something like keep the flush-out hose connected but turned off you run the risk of a slow "trickle" of water continuing to flow through the hose (maybe because the shutoff valve doesn't completely turn off).  A vacuum breaker doesn't work well with a trickle of water, it needs a steady flow in order to make sure water doesn't leak out through the gap.  This could be what is happening in your case.  I normally never leave the flush-out hose connected when not in use to prevent accidental (disastrous) consequences of it being turned on by mistake.

Brad Burgess:
Hello All

OOPS!  In my previous triple post I should have said San-T-Flush, NOT Sanicon.  This vacuum break was on the black tank flush circuit and was located behind my washing machine.  If you go to http://www.rvproductsnow.com/SwanRvProducts/Product%20Categorie%20Pages/Flushing%20Systems.php you will see how it fits in the tank flush system.  Sorry for the mix up.

Brad Burgess

Joel Weiss:
Ok, so it's the same as what we have.  So the question is do you have a hose connected on the outside when you are experiencing this leak?

Don and Kathy DuCharme:
Thanks everyone!  The leak was sporadic, but I did not make the association with using the San-T-Flush. That, in fact, is when the leak occurs (confirmed today).  The leak is because the plastic backflow valve connected to the brass valve is broken where it attaches to the red water line.  Now, thanks to all, I know that I can temporarily fix the problem by capping the 2 water lines until I get the replacement valve.  Thanks again.
Don

Brad Burgess:
Hello All
Thanks Joel.  I actually replaced the vacuum breaker with a brass back flow preventer valve.  When the vacuum break fails it also allows black tank odors into the coach.  As soon as I can figure out how to correctly size photos for posting here I will post a shot of the valve replacement.

Brad Burgess

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