I have a noise problem with my plumbing and i'm hopeing that someone out
there can give me some advice.
My problem is this. Every time I flush the upstairs toilet there is a loud
rumbling noise all throughout the house. This doesn't happen if I flush the
Anyone know what's going on?
Try this experiment. Shut off the valves on your washing machine
hoses and see if that stops the noise. It could also be any of the
single handle faucets in your house, and you can shut off the shut-off
valves, utilizing the process of elimination. It could also be
something as simple as a loose pipe. Do a little detective work and
If the rumbling noise is more like a 'bang' and rumble that happens when the
toilet finishes filling its tank, then the issue is water hammer and can be
caused by a bad (or missing) expansion tank. The expansion tank is
installed at the water entrance if on a private well/spring system or near
the hot water tank, usually, if you are on a public supply. You may also
notice your hot water heater will 'blow off' if the expansion tank is bad
(or not installed at all). In some cases, small hammer arrestors may need
to be installed on the top floor under a lav sink even when the expansion
tank is ok. Most (good) plumbers install these behind the wall with the
shower valve, but they tend to fill up over time and loose their shock
absorbing capacity until someone drains that branch down well enough to
recharge the air in them.
If the rumble happens as soon as you flush the toilet, it means that the
drainage pipe may be loose in the floor and wall. In high end work, I like
to use cast iron in the wall for 2/3rd story drops because it's quieter.
The PVC used most commonly can be noisy even if it is well secured. Check
for hangers every 4 feet in the basement if the pipe is exposed. You may
need to open some walls/ceilings to fix it.
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.