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Old 04-04-2011, 09:41   #1
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Check Valves in Fresh Water System

I am in the midst of redoing our fresh water system and was wondering what ABYC says about check values - do you need them? If yes where?

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Old 04-04-2011, 10:01   #2
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Re: Check Valves in Fresh water system

I place one just at the pressure side of the domestic pump, so when on dockside water there is no possibility of backfilling the tank accidentally. That said, I usually rig a bypass valve around the pump and check valve to fill the water tanks without opening the deck fill.
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Old 04-04-2011, 10:29   #3
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Re: Check Valves in Fresh water system

FWIW your pump already disallows back flow. Depending upon the cracking pressure, you will surely degrade water flow to some greater or lesser extent.
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