To connect unthreaded galvanized piping, you need to use a coupling to place the two pipes collectively. Once you have selected the right coupling, you will need to use fastening bolts in addition to a torque wrench to keep the two pipes coupled. To make certain you get the ideal https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html