Sewer Line Penetration of Foundation, Best Practices
Hi,
I’m in the process of replacing my 70+ year old sewer line. As part of the job, I need to replace some very rusty 3″ galvanized that runs through the poured concrete foundation. My guess it that at best I will be able to cut the pipe and chisel out the remains to have a rough 3″ opening. My city, Seattle, follows the IRC and I’m guessing that I will need to adhere to IRC 2603.5 and 2603.4. I’m having trouble finding a good photo, diagram or article that goes illustrates the best practice for making a foundation penetration with a sewer line. Any help would be greatly appreciated!
Thanks,
John
1. Pipes Through Footings or Foundations – Any pipe that passes under a footing or through a foundation wall shall be provided with a relieving arch; or there shall be built into the masonry wall a pipe sleeve two pipe sizes greater than the pipe passing through. (IRC P2603.5)
2. Sleeves – Annular spaces between sleeves and pipes shall be filled or tightly caulked as approved by the building official. Annular spaces between sleeves and pipes in fire-rated assemblies shall be filled or tightly caulked in accordance with the building portion of the code. (IRC P2603.4)
Replies
John
I've no diagram or photo.
Here, I would probably drill out around the still in the foundation but cut shorter pipe to the dimension of the pvc sleeve I'd be using.
This way, the pipe that remains will give me something to help guide a half inch or so drill bit through that foundation. Block wouild be easy. Poured, not so easy.
or
I'd call a concrete drilling company, have them mount and core drill around that pipe (cut flush with the foundation) to the size just a bit bigger than my sleeve O.D.
Seal in the sleeve, pass the new line through and seal that. Do a good job with your choice of sealant, I'd use a high grade Urethane. Pack with backer rod b/4 caulk.