at a natural gas water heater. It is not the sound you get from buildup
at the bottom of the tank. It sounds like someone is hitting the pipes
with a small metal hammer. If you put your hand on the pipes you can
feel the shock vibrating the pipe. It happens late at night when there
has been no use of hot water and the burner has not been on. If the main
supply ball valve to heater is turned off, the noise stops. Sounds like
it is pressure related. Ideas, suggestions, buy a new house?
Thanx in advance.
There's not enough information here to diagnose properly, but, I'm gonna'
immediately suggest that you add an expansion tank on the hot side (of
course) of your water heater. This is not for rookies.
Hire a plumber.
You need to install something called an "air hammer". Its like an
upright cylinder filled with air to soften sudden draw or shutoff. Even
a slow draw into a toilet or something in the middle of the night can
make it vibrate the pipes.
Depending on what kind of pipes you have, you may be able to take about
the pipes and install this thing yourself. They'll have them at your
local home store.
I'm purtty sure it's not called an air hammer, but a flux capacitor.. or wuz
it a peep anti-vibrator... opps no it wuz the thing a majig that you know
stops the water from flowing back towards the street....
edock... It could be a number of things... When there is a sudden stoppage
of water in the pipe, or too many fittings have been used to get from point
A to point B... Pipes that haven't been secured properly
(expansion/contraction)..A dirty cartridge (shower control). Is there a
check valve on the hot water line... Maybe it's chattering? Like you said
maybe it's the ballcock... Who knows? I wouldn't try and guess and say
outright that you need shock arrestors.. Try pouring some bleach on the
pipes I hear that works too..
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