Option to replace inline vacuum breaker on black tank flush

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Well-known member
Feb 8, 2019
I have an inline vacuum breaker that leaks a bit and from reviews seems like a recurrent issues with these. Unsure if my system has an check-valve in it. Was thinking of removing the vaccume breaker and using 1/2 nipple to connect the 2 hoses and using a vacuum breaker on outside of rig that I just attach to water hose when flushing. Thoughts if this could cause any issues?


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I think that will work as long as the water inlet is higher than the tank so it doesn't start syphoning. If the inlet is higher, than I don't think you'll need it. I would put a hose type shut off on the inlet just to prevent any smells to exit the flusher hose fitting.
Something like this:

    IF it was a building, that would not be allowed. the spring inside does allow for a certain amount of water to come thru to the hose. It depends on how much turd water you will allow in your drinking hose or the parks system.  The factory vacuum breaker, no matter how big a pain in the butt they are, are considered to minimum
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