FYI / IF YOU GET IN A BIND AND & NEED TO TRANSITION FROM A STEEL WATER LINE PIPE TO A PVC WATER LINE FOR A QUICK FIX AT HOME FOR A LEAK OR NEW LINE THEN THIS IS A SIMPLE FIX AND HERE YOU GO.

https://www.homedepot.com/p/Apollo-1-in-x-1-in-PVC-Compression-Coupling-PVCCOMP1/317901057

Then just use PVC pipe & couplings the rest of the way to get the job done.

Note: Not saying it is a permanent fix by no means but will get a person out of a bind quick for a good while when needed. They work great!

NOTE: PENDING HOW BAD THE STEEL PIPE IS CORRODED THAT IS. IT HAS TO HAVE FAIRLY DESCENT STEEL PIPE FOR IT TO SEAL CORRECTLY FOR NO LEAKS.