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Old 11-26-2017, 02:49 PM   #1
Senior Member
Join Date: Apr 2013
Posts: 101
Replacing my Tank Flush Valves

Hi all,

I recently had the air admittance/check valve fail on my black tank flush system. The seals inside failed and leaked water whenever the flush was used.

After pricing a replacement, I was shocked at how much that lousy plastic part cost ($46 on Amazon), so I decided to use brass parts which are both cheaper and more durable.

Anti-siphon vaccuum breaker:

Check Valve:

I also purchased some adapters from the local hardware and opted to replace the existing PEX screw fittings with brass.

The new setup works great.
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Old 11-26-2017, 02:59 PM   #2
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Location: Prescott, Arizona
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Nice job posting!!

Got mine at Home Depot.

'04 Newmar MADP: 1Kw solar, Silverleaf, '17 Rubicon
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Old 11-26-2017, 07:13 PM   #3
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Posts: 2,178
Back flow preventer and air admittance valve. Belt and suspenders!
'04 Newmar Mountain Aire 4016
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tank, valve

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