Draw a gas piping system sketch showing the proposed location of the piping, as well as the pipe size of different branches before beginning.
Install polyethylene pipe materials and compression couplings for all underground installations. Install factory prefabricated Xtru-coated fittings for all joints. The fitting you will use will vary according to the fitting you want to make.
Butt fusion weld all fittings using an electrical fusion tool. Hold the fusion tool against the fitting to be fused following the directions that came with your fusion welder. Electrical fusion tools heat the ends of both pipes to be joined, and pushing the pipes together makes the joint.
Hydrostatically pressure test all pipes to at least 150 pounds per square inch of pressure before burial.