[Shop-talk] pressure reducing valve

[Steven Trovato]

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?

-Steve Trovato
strovato at optonline.net

At 03:36 PM 3/23/2009, scott.hall at comcast.net wrote:
>we have a well. the exposed above-ground pvc tubing froze and broke 
>during the last snap. apparently, the pressure reducing valve froze 
>and split as well and it now spraying pretty good.
>
>the question is: do I need to replace it? the well cistern tank 
>already has a pressure valve in it, and the pressure in the house is 
>too low for my liking anyway.
>
>anybody have a well, and do you have a prv between the tank and the house?