first one is an abandoned 4" line that will be cut and plugged where it enters the ground
second is used as a sleeve for two smaller lines and needs to be sealed at the end to prevent water or dirt entry.
I had originally thought that cement grout could be used, but with wide temperature swings / expansion and contraction of the pipe, it might not seal tight. I would like to avoid trying to use fused HDPE fittings. Is there another material that might work?
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