The upstairs toilet is working perfectly but it frequently makes a loud noi
se somewhere down the line when flushed in the middle of the night. It soun
ds like someone slammed a door in the basement. This only happens when I fl
ush it at night, like around 2:00 a.m. or so, no such noise during the day.
Any ideas as to why this happens?
Could be the sound of turds being dislodged.
Christopher A. Young
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The upstairs toilet is working perfectly but it frequently makes a loud
noise somewhere down the line when flushed in the middle of the night. It
sounds like someone slammed a door in the basement. This only happens when
I flush it at night, like around 2:00 a.m. or so, no such noise during the
Any ideas as to why this happens?
On Sunday, September 22, 2013 6:24:54 PM UTC-4, SRN wrote:
I don't think it's from the fill valve. Here's the sequence: 1, flush toile
t; 2, about two seconds later, a loud thump from somewhere way down below,
about the time I would imagine the water from the flush to get to the drain
pipe which heads out perpendicular from the waste line to the sewer line;
3, at this time the tank has already begun filling.
Buy a "mechanic's stethoscope" for $10 to $15 in any place that sells
A mechanic's stethoscope allows you to pinpoint the source of noises.
You hold the metal probe to whatever you suspect is making the noise,
and the noise will be heard louder and louder as you touch the probe
closer and closer to the source of the noise. It will be heard loudest
when you're touching the probe to the source of the noise.
In this way, you can touch the probe to both the water supply line to
the toilet, and the vent stack in your basement to see if the noise
originates in the supply piping or the drain piping.
It's very possible that the thump you hear is actually the water hitting
the bottom of your vent stack. If you have a mechanic's stethoscope,
you can check for that noise during the day and at night, and I'll
expect you'll find it's equally loud all the time, it's just that
there's more competing noise during the day.
Mechanics use these tools to pinpoint the sources of noises in
machinery. I have a cheap Lisle mechanic's stethoscope I bought for $15
every bit of 25 years ago, and it's a very handy tool to have because it
allows me to pinpoint the source of all kinds of noises. Wish I had a
similar tool to pinpoint the source of odors.
Is it always about 2 sec latter? If not, I would guess it's water
surge in the pipe from the pump to your pressure tank. The surge is
causing the pipe to vibrate. It probably occurs during the day also,
but you don't hear it because of ambient noise, distractions, etc.
Web based forums are like subscribing to 10 different newspapers
and having to visit 10 different news stands to pickup each one.
A long shot but it could be that your "water hammer arresters"
are partially malfunctioning.
It's possible they're getting, for want of a better term,
pushed all teh way in overnight (when little water
is used), and partially reset during the daytime when
there's more water activity.
Knowledge may be power, but communications is the key
I'm not being funny, but don't flush at the 2 AM time and see if the
noise happens in the morning flush.
I suffer from an enlarged prostate and my nighttime visits happen around
4 AM (no noise though).
I too have a well.
I would shut off the water into the toilet and then do my usual 2 am flush.
If the noise is still there, it is obviously something to do with the dra
in line. If the noise is not there, it is in the water supply system. Thi
s is so obvious a way to troubleshoot!!!!.
On Monday, September 23, 2013 11:05:10 AM UTC-4, firstname.lastname@example.org wrot
h. If the noise is still there, it is obviously something to do with the d
rain line. If the noise is not there, it is in the water supply system. T
his is so obvious a way to troubleshoot!!!!.
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