jaynews wrote:
Ok, I hear you. One reason for the hesitation is that there is some doubt
as to whether the "thunk" noise (vibrating pipes) that I'm hearing is REALLY
a severe enough hammer to be doing the pipes any harm. Some people were
telling me that a "thunk" noise of vibrating pipes at shutoff is harmless,
while others insist that it is bad for the pipes.

While the pipes upstream are vibrating enough to make a thunk noise, the
vibrations don't make it all the way back to the beginning of the water line
in the basement (2 floors down). The vibrations only make it down one
floor. The hammer is a noticeable thunk noise but not horrendously lound.
The toilet bowl itself does not seem to vibrate when it happens.

If there is no quick/easy way a homeowner could determine for sure if the
thunk noise is REALLY a problem, then agree that I should just shut up and
get the Korky tomorrow and install it to be on the safe side (in case the
hammer is really a problem), and to put this issue to rest.

J

I'd be less concerned about the pipes and more concerned about the
cheap-assed plastic that Fluidmaster uses. I had one physically break
when we were out of town for a few days - had 10,000 gallons of water
run through the house. Cost $3800 for house restoration. Plumbers say
they see Fluidmaster products break all the time. I use nothing but
brass now.

Bob S.