Loosen the stainless steel clamps of the flexible rubber coupling with the 5/16-inch hex-head adapter and drill motor.
Clean the end of the black pipe and the PVC pipe with a clean rag. You need to ensure that the ends of both pieces of pipe are free of dirt, dust and debris that will interfere with the installation of the flexible rubber coupling.
Slide one end of the flexible rubber coupling over the end of the black pipe and then slide one end of the PVC into the other end of the flexible rubber coupling.
Tighten the stainless steel clamps with the 60-inch-pound 5/16-inch tee-handle torque wrench. Before you tighten the stainless steel clamp, make sure that the clamp rests in the molded groove of the flexible rubber coupling.
Test the connection for water leaks after you have tightened both stainless steel clamps to the proper torque. If the connection leaks, make sure that both stainless steel clamps are tight and that both ends of the pipe in the connection are seated properly in the flexible rubber coupling.