How do I connect a 1/2" PVC slip joint to a 3/8" compression fitting on a sink faucet?
Glue a 1/2" slip x FIP adapter into the PVC fitting (this requires a short piece of PVC pipe also).
Thread a 1/2" MIP x 3/8" comp. adapter into the FIP fitting (use teflon tape on the threads.


NOTE- pictures are for reference of fitting type and may not link to the size(s) you need.