You should never rely on the presence or contents of anything under the .git directory. That's git's territory, not yours or the build system's. Use it's plumbing commands to get access to the information you need, rather than trying to read files directly. Git provides no guarantee about the location or contents of any of those files as far as I'm aware.

This repair fitting is designed to seal leaks at a glue joint for Sch.40 pipe.

Where connecting plastic pipe to other types of plastic or other types of piping material; approved listed adapter or transition fittings and listed for the specific transition intended shall be used.

PVC DWV is dense, straight, and durable; also approved for use.ABS ("black") and PVC expand and contract differently, don't intermember directly. There's a flexible cement available.

One of the most common traps to dry out are floor drains such as those typically placed near home furnaces, water heaters and rooms with underfloor heating.