Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-05-2011, 07:51 PM   #1
Newbie
 
Join Date: Aug 2010
Posts: 26
Rewards Points: 0
Share |
Default

Expansion joint


I have discovered a small and strange leak in the waste lines for my new home, built originally in 1993. It is a log home and the plumbing is ABS. In late Summer, I discovered a small leak at the hub of a 3" line going to the main vertical waste stack. Imagine a T. One side of the cross serves the master bedroom. The other cross serves the guest bedroom. Both bedrooms are on the 2nd floor. The vertical line goes from the 2nd floor to the basement and exits through the basement floor. I had not used the bath or toilet in the guest room until this time. The connecting joints were all concealed in a cabinet. I opened that and found the leak. It leaked about a tablespoon or two of water over the course of a day after flushing the toilet. It seemed to come from right where the horizontal pipe entered the hub of a wye to the vertical stack.

Both arms of the T go to toilet flanges that are very close to the vertical pipe. The resulting connections are rigid. I cannot wiggle the wye's or bends at all. In the course of tracing the leak at the joint, the weather turned cold (20 to 30F drop) and it stopped leaking. There are no expansion joints or rubber connections in the drain system.

Right now, I am working on two assumptions:

1) Expansion during the hot period caused strain on the joint to open a hairline crack. With cold weather, that closed. So far, I have not turned the heat on in the house and it is quite cool, say 50 to 60F.
2) My probing to find the source of the leak moved a flake of ABS that sealed the leak, at least temporarily.

I have added a fluorescent dye and will check that tomorrow. Also, we are back to a little warmer weather.

I am pretty ignorant about the use of expansion joints, but I find them advertised on various log home sites, because logs settle.

MY QUESTIONS:

1) Must expansion joints be used only in vertical lines? When installing, is there a rule of thumb for how compressed or expanded they should be? It is a 3" waste line.

2) Can rubber couplings be substituted?

3) Can rubber couplings be used for horizontal runs?

4) Is my theory that this is temperature related completely crazy? Would you just repair the leaking fitting and forget about adding an expansion joint?

John

john4153 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Porch Against House- Anchored or Expansion Joint? Queso Bandit Building & Construction 10 08-25-2011 12:43 PM
Bamboo Engineered Flooring/ Expansion Joint Annielaurie Flooring 1 04-16-2011 11:24 AM
Tiling over expansion joint - confused jkr77 Flooring 20 04-12-2011 03:56 PM
concrete expansion joint sealer Stavop Building & Construction 6 07-27-2010 02:13 PM
expansion joint farrington135 Building & Construction 1 01-27-2006 10:02 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.