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Old 06-30-2012, 08:09 PM   #1
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PRV on black tank flush

Is it necessary to use prv on black tank flush? Also I dont even see on my owners manual where I need a prv on city water connection but dealer told me to use one and boy does the pressure suck!!
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Old 06-30-2012, 09:36 PM   #2
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PRV?
Pressure regulator valve?
what pressure is the one you are using 40 to 45 or 50 to 55 psi?
I do not use one on my tank flush
I do use a back flow preventer though
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Old 06-30-2012, 10:29 PM   #3
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According to what I found on google, the vacuum breaker valve needs 40 psi to open.
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