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Posted by JoeSpareBedroom on October 31, 2007, 3:23 pm
>
>>>
>>> > Per an earlier discussion, I have been trying to ensure that I will
>>> > not have a future problem with T&P valves in my house... bought a
>>> > pressure gauge at the Despot last night on my way home from work
>>> > (there's a rant in there, but not pertinent) hooked it up, system
>>> > pressure is about 68-70 PSI falling to 60 PSI with a faucet open and
>>> > momentarily spiking to maybe 78 PSI. This is measured in the
>>> > basement, at about the level of the T&P valves. I left the gauge
>>> > connected overnight and the hot water heater went through at least two
>>> > cycles and the telltale did not rise.
>>>
>>> > Everything I've read says that pressure should be regulated to 60 PSI
>>> > or less, I am guessing since I did not experience a rise in pressure
>>> > when the water heater cycled that I don't have a BFP on the main water
>>> > line (actually, the weird thing is I don't even know if I have a
>>> > meter, I can't see one unless it is buried underground) so "by the
>>> > book" I should install a pressure reducer set for 60 PSI but since a
>>> > pressure reducer would also act as a BFP I would then need to add an
>>> > expansion tank as well.
>>>
>>> > Question is, is this really necessary or is 70 PSI OK? I'm not
>>> > looking to spend a lot of money on plumbing but if the high pressure
>>> > could potentially cause an issue I guess I should take care of it.
>>>
>>> > thanks,
>>>
>>> > nate
>>>
>>> > PS - the Home Despot rant. Found a Watts brand "test gauge" at the
>>> > Despot on my way home from work (pressure gauge with telltale, screwed
>>> > into a female garden hose fitting) bought it, took it home, found that
>>> > the telltale was bent so that it didn't catch the gauge needle. Went
>>> > to a different Despot near my house, they didn't have a gauge to
>>> > exchange it. Drove back the other direction to go to the original
>>> > store, told the guy I wanted to exchange the gauge, well either he
>>> > didn't speak English well enough to understand or just didn't know
>>> > that you could do a straight exchange, so he refunded my money and I
>>> > had to buy another one, meaning I had to stand in line again for 20
>>> > minutes to check out... grr... probably wasted a good two hours on
>>> > this whole exercise. And then I had to run out again to get matches
>>> > (see my other post from this morning) so I didn't even get home until
>>> > close to 9 PM. I'm really starting to get sick of plumbing stuff.
>>>
>>> I was lucky enough to drop mine, whereupon the glass just popped out
>>> so I could twiddle the needles by hand and jam the glass back on.
>>
>> You should have a pressure reducing valve on your main water line
>> where it enters your house. Usually shaped somewhat like a bell.
>> Tnere is a screw in top that will increase/decrease the pressure.
>> Unfortunately I don't remember which direction you need to go. Maybe
>> someone else remembers. Try only one quarter or one half revolutions
>> at a time.
>>
>
> Why should they have a pressure reducing valve?
>
> Bob
Because in some locales (like right here at my house), the unrestricted
water pressure may spike to 100-125, and even if you don't mind your pipes
slamming, some appliances and devices might have issues with.
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