My guess is that scott's system had a pump control that was cranked
up to 70 psi shut-off pressure or maybe even higher in an effort to
store more water/pressure per pump cycle. Then the pressure reducer
was to send water to the house at more or less standard pressure
(perhaps 40psi?). Scott's pressure reducer should be adjustable to
give him higher house pressure, although he can get full pressure by
leaving it out of the line. The only drawback that I can see (based
on our second home's pressure tank and booster pump from an 8000
gallon storage tank on the hil) is that his house pressure will vary
without the prv valve between whatever the limits are set on his pump.
When I take a shower I can tell the difference between 40 and 60 psi,
but it's not a big deal.
Our pressure tank as a relief valve built into it. No other relief
valve 'downstream'. Maybe Scott's tank has one, too.
-Roland
On Mon, 23 Mar 2009 20:12:43 +0000 (UTC), you wrote:
::nope steve, that's exactly what I have and that's the tank I mean when I say
cistern. I'm just not sure I need a prv between the tank and the house,
because, like you said, the tank maintains between 40 and 70 (I think on mine)
lbs. of pressure.
::
::I'm trying to remember, and I don't think I had one on the old house, which
had a well, too.
::
::----- Original Message -----
::From: "Steven Trovato" <strovato@optonline.net>
::To: "scott hall" <scott.hall@comcast.net>, "Shop Talk List"
<shop-talk@autox.team.net>
::Sent: Monday, March 23, 2009 3:49:18 PM (GMT-0400) Auto-Detected
::Subject: Re: [Shop-talk] pressure reducing valve
::
::I have a well. There is a check valve between the well and pressure
::tank. This is a tank with air above a bladder or diaphragm that
::compresses as the tank fills with water. Is this what you mean by a
::cistern tank? Anyway, I have a check valve before that tank that
::prevents flow back into the well. Then after the tank there is a
::pressure relief valve that will allow water to escape if the pressure
::goes over a safe threshold. None of this does any pressure reducing
::in routine operation. A control switch turns the pump on when the
::tank has 40 pounds of pressure, and off when the tank has 60 pounds
::of pressure. Perhaps you have a different type of system?
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