Chris wrote:
All,
I own a condo that was built in the mid to late 70's. Recently, we had
individual water meters installed at each unit, and a plumbing company
installed PRV's at each unit as well. Started noticing some strange
things after this happened. First - the water pressure was cut in
half...which is not all that bad, being that our pressure was around 105
pounds prior. Over the past few weeks, I have noticed that our pressure
seems to build. For example, after some time not using the water, I can
flip on the kitchen sink and the pressure is extremely high - then
levels out.
The plumber came out again and replaced the PRV - still notice the problem!
Anyone have any suggestions as to what might be the problem here? I
would also mention that our hot water heater is quite old (not sure how
old...but during the inspection we were told that it probably had a
couple of years left). Could this be a potential culprit?
Thanks
Chris
Anytime a PRV is installed, a thermal expansion tank is *required*
on the water heater. The PRV prevents the high pressure created
by expansion from returning to the street main.
Mo
http://www.stateind.com/expansion/expansion.htm
If you get flack on this, call the city inspector to get
their official position.
Jim