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Old 11-26-2017, 02:49 PM   #1
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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:
https://www.amazon.com/gp/product/B000MNLNF6/

Check Valve:
https://www.amazon.com/gp/product/B00HJ6P0Z8/

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.
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Old 11-26-2017, 07:13 PM   #3
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Back flow preventer and air admittance valve. Belt and suspenders!
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