"H" wrote in message
news:ExR%f.19$JY5.4@trnddc01...
I had my bathroom refurbished about 5 years ago. All is well, except for
one new thing that started last night.

When I run the hot water, the pipes apparently start to shift in the wall.
This has not happened prior to last night. It is loud. It sounds like
the joists are being pried apart while the water gets hotter, and a very
loud drip while it is cooling down. When the water cools in the pipes, the
sounds stop.

Should I worry?

Thanks.


This is a common occurance when the pipes are secured to the studs using
only brackets. The expansion of the pipe causes it to slip along these
fastners. A good install uses plastic isolation hangers to avoid this
noise. A shame the plumber didn't spend the extra $20 or so it would have
cost to use these hangers.

It is generally not a sign of impending failure. Why suddenly, perhaps one
bracket was acting as an anchor and it finally gave up.