[Shop-talk] pressure reducing valve

[Steven Trovato]

I can't say that you don't need this, because I'm not an expert and 
perhaps there's some sort of special situation I don't know 
about.  But I can say that I don't have any such thing on mine.  I 
haven't seen one on other systems I have looked at.  I recently 
replaced my tank, and there was no mention of this in the 
instructions for recommended ways to configure the system.  Usual 
control switches maintain 30 to 50 pounds, or 40 to 60 like 
mine.  Perhaps if yours was going to 70 someone added this in a 
misguided attempt to limit the pressure, rather than adjusting or 
replacing the switch like they should have done.  Just a guess 
though.  What you should have, though, is a safety pressure relief 
valve, and I would think that would have to be located before your 
pressure regulator to properly protect the system.

-Steve



At 04:12 PM 3/23/2009, scott.hall at comcast.net 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.