Toilet Ticking - General DIY Discussions - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > DIY Forum > General DIY Discussions


Thread Tools Display Modes
Old 01-15-2009, 10:05 PM   #1
Join Date: Jan 2009
Posts: 1
Rewards Points: 10

toilet ticking

After flushing the toilet, there is a ticking in the wall? What is causing it?


erienbooker is offline   Reply With Quote
Old 01-15-2009, 10:23 PM   #2
Join Date: Jun 2008
Posts: 2,467
Rewards Points: 2,906

Originally Posted by erienbooker View Post
After flushing the toilet, there is a ticking in the wall? What is causing it?
In mechanical engineering, one of the things you learn is that static friction tends to be higher than dynamic friction. That is, if you put a steel block on a board, and then elevate one end of the board, the friction holding the block in place will be greater than the friction between the steel and the wood once the block starts to move. (Friction is one thing that every scientist will tell you that we simply don't understand well, or at all, really.)

One result that arises when static friction is greater than dynamic friction is "earthquake" type motion. That is, static friction will hold the pipe in place against the wood studs until the tension builds up sufficiently that it overcomes the static friction and the pipe moves. Since dynamic friction is less than static friction, the pipe moves until tension in the pipe is lowered and dynamic friction brings it to a stop (when static friction pins the pipe in place again). Then, tension builds up again, and it happens all over again. And, your cold water pipe does that dance with the wood studs in the wall every time you flush the toilet and it gets filled with cold water, causing it to shrink slightly.

It's this repeated "rubbing" contact between the cold water supply piping and the studs in the wall that you hear as a "tick" pause "tick" pause "tick" noise. The filling of the cold water pipe causes it to shrink slightly, and the rubbing against the wood as it contracts cause the noise. The very same thing happens in houses with hot water heating systems with the heating pipes rubbing against wood.


Bashing my head against the walls in some of the internet's finest chat rooms.
Nestor_Kelebay is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help me check my logic on clogged drain and overflowing toilet Southlake_Ed Plumbing 10 01-05-2010 07:52 PM
Toilet Leaks When Flushed - How to get at closet bend!! OldHouseNewProblem Plumbing 3 12-11-2008 06:24 AM
HELP - Seriously leaking toilet JAR Plumbing 3 11-03-2008 04:28 PM
Where is the toilet vent?!?!? domgbrown Plumbing 4 01-11-2008 06:33 PM
Installing an attach-to-floor toilet? johnny4321 Plumbing 5 11-22-2007 01:34 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1