Couplings are Yet another well-known selection for connecting galvanized pipe without threads. They are available in a variety of styles, including slip couplings, force-in good shape couplings, and compression couplings. The set up method may differ a little bit depending upon the form of coupling used, but normally will involve: https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html