To connect unthreaded galvanized piping, you will need to make use of a coupling to put The 2 pipes with each other. When you have chosen the right coupling, you will need to use fastening bolts in addition to a torque wrench to keep the two pipes coupled. In order https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html