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Old 12-02-2010, 04:41 PM   #1
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duplicate pressure reducers?


Poking around our new house and I see not one, but two pressure reducers...inline, about 3 feet apart, 2 feet down from the water main. what gives?

Does a second reducer do anything more than the first one already does?

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Old 12-02-2010, 05:28 PM   #2
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duplicate pressure reducers?


Whenever I install a PRV there are instructions in the box for a double prv system. If the incoming water pressure is really high, say 150 psi, they would set the first at 120 and the second at 80. Or one of them went bad and they just stuck another one inline?

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Old 12-02-2010, 06:00 PM   #3
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duplicate pressure reducers?


main side is 120, and output side of the second is about 55....do you need two PRV to achieve a 65psi drop?
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Old 12-02-2010, 06:09 PM   #4
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duplicate pressure reducers?


I don't know if you "need" two but I would bet that those two will last longer than one would twice.
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Old 12-03-2010, 07:21 AM   #5
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duplicate pressure reducers?


My parents' house has about 160 incoming PSI, they use a single watts PRV to reduce to about 55 PSI. The prv did eventually break....after 30 years.
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