Welp... it's done. Got the PRV installed and - based on comments here and
some common sense - I decided NOT to install an expansion tank. The PRV is
set at 50. I've got 38psi now I don't think I need be concerned with
anything regarding this water line INCLUDING the washing machine hoses. Both
of them at the high pressure, wire mesh wrapped type anyway.

I appreciate all the help.


"George E. Cawthon" wrote in message
...


John Gregory wrote:

I posted here last week and would like to get some additional info
please.
My Village is kicking up the water pressure next Friday. They've given
anyone who asks, a free reduction valve. Pressure is currently 40psi
prox
and will increase another 35 - 40 according to the Village. I was all
set to
solder this puppy in place when I read the brochure and saw the
recommendation of an expansion tank. I know three neighbors who have had
the
valve installed; none added an expansion tank. These home are about 30 -
35
years old. My next door neioghbor - who built 800 homes over the past 25
years - says he doesn't think he's going to even add the valve. His
house is
less than 10 years old though. I'm more concerned about having a closed
system with the threat of thermo pressure. I guess if I DON'T puit that
valve on and pressure builds, it has releaf by flowing back past the
meter.
Apparently it can't do that if I put that valve on.

Q1) Is this right?

I keep my water tank at about 125 - 130. It has a pressure releaf valve
on
it. I'm of the opinion that most people feel the probablility of needing
an
expansion tank is pretty remote. Give these conditions...

Q2) Would you think they are right?

I don't understand why you would do anything. The pressure
at my house is 80 psi, check it every once it awhile when it
seems the pressure is down. No expansion tank. Why do you
need one? The pressure relief valve on the hot water tank
takes care of protecting the hot water tank