wrote in message
ups.com...

MLD wrote:

What I would guess is: The dynamics of the reducing valve maybe too
slow in
getting to its steady state regulating position. With no flow the valve
is
in a closed position. When there is a sudden flow demand (opening a
faucet)
the valve moves opens to provide flow but actually overshoots its steady
state position. For whatever reason it then slowly closes down to
regulate
the pressure. It's during that time frame that there is high flow out of
the
faucet. In high performance systems, PRV are fast acting with time
constants in the order of 15-20 millisecond. There are many things that
slow down the transient response of these type of valves--in many cases
it
is getting the control pressure to bleed down allowing the valve to
respond
quickly Usually a damping orifice being too small is one reason.
MLD


Just what people need here is more phyco babble bull**** to confuse
people even more. When all that was really needed was a plumber with a
gauge and a little knowledge on how to use one.
Instead you got a plumber that replaces things because they look old so
it must be bad theory.

kennyb

Hey Dumbo
Your response is very refreshing--be so good as to explain just how a gage
will resolve the problem. What does the pressure tell you if it's high? or
if it's low? Or if it goes from high to low? What it does after or when a
faucet is opened? In fact, if it's not bled properly you can't believe
anything it tells you other than steady state. In many cases you have to
understand the problem before you can fix it. Oh, BTW, sorry if you got
confused--but when you have an IQ about the same as your hat size that's
easy to understand.
MLD