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Posted by on October 13, 2009, 12:35 pm
On Tue, 13 Oct 2009 09:24:23 -0700 (PDT), DerbyDad03
>On Oct 13, 6:19 am, sa...@dog.com wrote:
>> wrote:
>> >I was taking a shower, when the water started a chattering noise, and the
>> >spray was a pulsed spray. This came on when the Moen twist dial was in the
>> >same position for about two minutes. I changed the dial, then returned it
>> >to the original temperature position, and it did it again. A little
>> >adjustment of the dial makes it go away, but it returns. What's this?
>> >Steve
>> The overall water pressure in your house has increased. The chatter is
>> the anti-scald device trying to deal with too much pressure.
>> You need to install a water pressure regulator...
>Or replace a defective one (BTDT)
>> and set it at around 50 psi.
>Hopefully, it's preset. Mine was.
Don't count on it. I've seen several that were labeled as being preset
to 50 pounds that were pretty far off. I highly recommend VERIFYING
that the regulator was set correctly by the factory.
>> The easiest way to check and adjust the pressure is to buy a
>> water pressure gauge that has a standard garden hose fitting on it.
>> You can buy these ready made for about $15.
>True (or less, I paid $12)
> > Screw it on to any hose bib to use it.
>To *use* it, that's true, but *which* bib you use might depend on what
>you want to check.
>The hose bib at the front of my house is before the PRV and therefore
>at street pressure.
Same here. I also have several available in the basement, but all of
those are after the regulator.
>The hose bib at the rear of my house is after the PRV and thererfore
>at "house" pressure.
>I knew my PRV was bad when they both read about 85 psi.
>And yes, the chattering went away after I replaced the PRV.
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> spray was a pulsed spray. =A0This came on when the Moen twist dial was in=