Wassermann Plumbing Out Kit This Plumbing Out Kit enables a softener drain to be attached to standard waste pipes. It simply clamps on to a 1¼" or 1½" waste pipe; then the self cutter is used to create a hole. Can be used to connect a water softener drainage tube or other drainage tubes to a washing machine drainage or under sink drainage pipes. It comes with additional fitments specially sized to be compatible with our range of water softener drain hoses. The unit also has a non-return valve to prevent foul water entering the drain hose and a 3/8" pushfit adaptor for 3/8" tubing.