We recommend if galvanized pipes are current, you think about obtaining them changed by an experienced plumber. When the pipes are set up Based on your measurements, make use of a screwdriver to tighten the bolts. While you tighten the bolts, they’ll protected the pipes into put inside the coupling. https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html