Couplings are An additional well known option for connecting galvanized pipe without having threads. They can be found in many kinds, like slip couplings, thrust-fit couplings, and compression couplings. The installation method differs a little bit based on the sort of coupling applied, but frequently involves: Right here’s a movie https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html