Quote:
Originally Posted by Foldbak
And what function does this contraption do?
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Vacuum breaker on the backside of the toilet is to prevent backflow of water from toilet into the water system ... required by code...
The one on the toliet is usually very reliable provided if you winterize you make sure this valve is either blown out or RV antifreeze used...
The anti siphon valve for the black tank flush is a complete piece of junk and should be either upgraded to an all brass one or eliminated by the owner before you have a flood in your RV