Boy are you lucky I have some free time, are these the questions you
have a hard time understanding?
Your response is very refreshing--be so good as to explain just how a
will resolve the problem. What does the pressure tell you if it's
if it's low? Or if it goes from high to low? What it does after or
faucet is opened? In fact, if it's not bled properly you can't believe
anything it tells you other than steady state. In many cases you have
understand the problem before you can fix it."
1)What does the pressure tell you if it's high?
You have high pressure call a plumber. Then you can watch him turn the
tank to pilot so it can't fire. Watch him relieve the pressure and put
his gauge on. He will at that time tell you what the pressure is, he
waits to see if it holds a constant static pressure. At that time he
knows if the PRV is functioning or not. "Take note here it dosen't
matter if the valve reacts in either 10 to 20 mili seconds it's the
constant static pressure we're after.:) This will answer question #1 If
the pressure is high the PRV is not functioning or is set wrong.
2)What does the pressure tell you if it's low?
If you have low pressure the PRV is working or the incomming pressure
is low to begin with, but check with the plumber to make sure no ones
brushing their teeth or taking a shower, will cover this later under
This should cover #2
3)Or if it goes from high to low?
Somebody flushed a toilet or their brushing their teeth again. I
suggest you wait till they're done before you continue.
That takes care of #3.
4) What it does after or when a faucet is opened?
Pay attention, this was already covered under #3
5)In fact, if it's not bled properly you can't believe anything it
tells you other than steady state.
I actually don't understand what you mean here, but we're actually
looking for the steady state your talking about. If you don't have it
return to #1- 3.
6)In many cases you have to understand the problem before you can fix
Thats not what you said earlier, you said it was easier to replace
things first, something about being cheaper in the long run, right.
O.K. lets continue before someone flushes again.
Now fire the water heater and watch the gauge, Note thermal expansion
at work. Does it level off at incoming pressure ( PRV allowing for
thermal expansion to push back into the main) or does it continue till
the T&P leaks @150 lbs. because the PRV is making a closed system. If
it's a closed system an expansion tank will be needed to keep the
pressure down. Keep in mind at any time this little test could be
stopped by opening a faucet, but be careful the increased pressure (
pressure spike I think you refered to it as)
will be relieved at the faucet when opened.
Total Time to figure out the problem, 10 minutes, no guessing involved.
Your comments won't rile me, I have many friends who are engineers and
I deal with people like you on a daily bases. They are by far the
toughest people to work for/with, they have an answer for everything
but usually lack commen sense. We're not talking aero space at Moog
here, it's basic plumbing.Could many of us take it to your level, yes
we could. But we choose not to because then we'd become just like you.
Maybe you should try staying at a Holiday Inn sometime, It works for us