kpikul said:
I have a water hammer on one of my hotwater lines.
Is this something I should be worried about or something I can get around to fixing when I get to it.
Fix it before it blows out a solder joint, or damages a fixture.
Does it hammer just when you turn the water on or off, or does it hammer all of the time that the water is running?
It could be caused by a partially closed valve, or a loose faucet washer that flutters when the water flows past it. I have also found pieces of solder shaped like coins that were trapped at ells in the line. They flutter like crazy; it sounds like the whole house is going to come apart.
It could be caused by an area of low pressure at a place where two different sized pipes connect.
It could be that you need to put some air into your water storage tank, or that you have a bad bladder in the water storage tank.
If your plumber is good (and sometimes lucky) he will isolate the problem quickly. If he is not, he may be scratching his head for a while with this one. Sometimes it's easier to fix than to find.
The other guys will be along with some input too, so check back.