Jadnashua
Retired Defense Industry Engineer xxx
Our state uses 2015 IPC. I live in a row of townhouses. We have a main sewer line that runs along the foundation wall sitting in open air and part of that is in garages, so while enclosed when the door is shut, it can get cold in there. Currently, that line is CI, but many people put in condensing furnaces, and did not install neutralizers which has the pipes eroding. The proposal is to replace it with PVC, but I don’t think this will work well. The run is essentially straight 200’ and goes through poured concrete walls between units and each unit has two wyes that connect to it, often along the foundation walls, constraining any expansion. I have estimated a max temperature variance of 70-degrees between the pipe and contents. Which calculates to slightly over 5” of length change. While there are sliding bellows type fittings that can accommodate that change, I’m not familiar with their long-term reliability or performance and if there were a fire or the PVC got damaged, it could make the other units upstream uninhabitable.
My preference is to replace it with hub-less ci and install neutralizers where required.
Are there any code issues that would force this one way or the other?
My preference is to replace it with hub-less ci and install neutralizers where required.
Are there any code issues that would force this one way or the other?