[Shop-talk] pressure reducing valve

[scott.hall at comcast.net]

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 at optonline.net> 
To: "scott hall" <scott.hall at comcast.net>, "Shop Talk List" <shop-talk at 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?