I learned this from a Plumber years ago. It works. You can count on it.

Amazon affiliate links to products in this video...

Rectorseal 5 Pipe Dope: https://amzn.to/48Y52E6

Teflon Tape: https://amzn.to/429gScw
NOTE: The yellow tape I use is made for sealing threads on gas lines. It is thicker than the white tape sold for water lines. The yellow tape is, in my opinion, a better product for water line thread connections.

Internal pipe wrenches (2 options):
ChinaMade GENERAL internal pipe wrenches (like I use in this video): https://amzn.to/4b6SqME
MUCH higher quality PROTO internal pipe wrenches: https://amzn.to/48EDxzO