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Old 08-05-2019, 03:15 PM   #21
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Originally Posted by 5picker View Post
Usually located by the bathroom sink or shower.
They are often bad right from the factory and leak, won't pass water or installed backwards. (cheap)
Get a brass one. Note flow direction when installing.

Will look like these...








Brass valves go bad too, ask me how I know.
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Old 08-05-2019, 05:04 PM   #22
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Brass valves go bad too, ask me how I know.
Well... yes... anything can go bad.
Your brass valve is the 2nd one I've heard of.
I have read/heard of several dozen plastic ones.

Take it for what you paid for it... nothing.
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Old 08-05-2019, 05:09 PM   #23
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Originally Posted by rlh1957 View Post
Do you remember where you got your brass valve or what brand and model it was?
Available lots of places online.
I think I bought this one...

Watts Water Technologies 1/2 LF288A Watts 288A Anti-Siphon Vacuum Breaker 1/2 In., Brass, Lead Free https://www.amazon.com/dp/B00467HJBQ..._pIksDbZV5EYDE
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Old 08-05-2019, 06:27 PM   #24
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Well... yes... anything can go bad.
Your brass valve is the 2nd one I've heard of.
I have read/heard of several dozen plastic ones.

Take it for what you paid for it... nothing.


Although I keep my rig heated allwinter, we did have a power outage for a day when the temps were barely below freezing. I can not remember if I blew out the black tank flush line or not. But I’m also thinking the batteries should have had enough juice to run the furnace for a while to kept the temps above freezing. So, I think it just failed.
What happens is, when turning on, and turning off water to the flush, water sprays out of the vacuum breaker.

No idea.
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Old 08-21-2019, 03:17 PM   #25
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I finally had a chance to bring the TT home from storage and connect a hose to the BW flush. The leak turned out to be a loose connection under the anti-siphon valve. I tightened the plastic fitting and no more leak.
This should have been caught at the PDI but the operation of this feature was not demonstrated by the dealer. My bad for not insisting on a test.
I am pleased this was a simple 5 minute DIY fix and not a 4-week out of service warranty ordeal at the dealer.
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