Quote:
Originally Posted by SchafferFamily
Right,... so if we remove it, and if our water valve is near the same elevation as our hookup for the hose, I guess potentially there could be a chance of this line having some black water in it, at least up the one vertical side under the sink?
I guess it is more important to maintain the high elevation of the elbow to keep that point higher than the black water tank entirely.
(Looking at diagram in Post #6)
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The height alone is not enough. Remember this is an anti-siphon device. Under the right conditions, the nasty stuff can still back feed through this line without the vacuum breaker in place.
You're better off to see if you have a problem first. If you decide to remove the vacuum breaker, use an anti-siphon hose bib on your garden hose where you attach it to the flush inlet. I got several of them with various aftermarket RV accessories for flushing waste lines. If you don't have one, they're cheap and readily available at home improvement centers and hardware stores:
http://www.homedepot.com/p/Orbit-Hos...7750/203720437
More info: If your vacuum breaker is brass, the chances of it failing are much slimmer that with the plastic ones. That would definitely fall into the "if it's not broke, don't fix it" category.
Folks forget to winterize the the black tank flush which could leave water in the vacuum breaker. When it freezes, it may break the plastic ones. Brass, not so much. I have an air to garden hose fitting and use it to blow out the black tank flush in the fall. It's not easy to pump the pink stuff up there, but a blast of air is sufficient to protect it over the winter.
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