in the winter it really rattles the pipes, in the summer it just has a
big vacuum sound. This only happens when someone turns off the cold
water very quickly and only in the one sink in the upstairs bathroom.
If they turn it off very slowly there is no problem so I was thinking
if I replaced the faucet handles with ones that don't turn off in one
big push. (the handle I have right now is a push up for on and push
down for off). Is there any easier way to stop this from happening? I
can't imagine the vibration is good for the pipes.
Well getting people to change behavior is nearly impossible.
Changing to a diferent faucet might help but adding a water hammer
arrestor is your best bet.
To simplify installation I would add it at the angle stop location.
If you have copper lines & compression fitting angle stops, the
following product will do the trip quickly & easily
I have ordered from PEX Supply a couple of times, I would recommend
If your home is over say 5 -10 years old, it is very possible that you
have anti-hammer devices in the walls, buy they have become saturated to the
point they no longer work. There is a cheap fix for this. You need to
turn off the main water supply.
NOTE: Turn the water heart off first.
NOTE: In older homes it is possible that the old valve may not be up to
being turned off and on again.
Next open a low valve (both hot and cold), like one in the basement to
let water run out of the pipes. It may help to open the upper valves as
well. Let the water drain. Then turn the water back on (I suggest turning
it on slowly.) then closing all those valves. That should do it.
I just recently followed the procedure (more or less) that Mr. Meehan
detailed and it eliminated the water hammer I was getting from my
washer. I do it every few years or whenever water hammer occurs.
The difference in my process is that I open every faucet, showers and
outdoor spigots included, to drain the system as much as possible.
One other point: When you turn the main shutoff (or any shutoff) back
on, turn it fully on, then close it about an 1/8 of a turn. The reason
for this is to give you a little room to move the handle in the "open"
direction in case it seizes up and you can't turn it off. If you open
it hard against the stop, you increase the chance of it seizing and
you'll have no "wiggle room" to free it up. Of course, this only
applies to gate valve shut offs, not ball valves.
Actually I have a question to people in this newsgroup. Does the
water hammer tends to occur in a faucet near the bottom half of the
house than one in the upper half of the house? I am under the
impression that water hammer occurs when a lot of water rushing down
but being stopped suddenly. Should the water hammer occur more often
with a faucet in the basement than the one in the upper floor?
Thanks in advance for any info.
I don't think there is much difference. It is the mass (not the weight)
of the water moving through the pipe that is the problem. So having it
going up or down will make very little difference. Think of it as inertia.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.