One-piece Intersewer UG Blue Star sewer nozzles, distributed by Sewer Pro Shop, are neither bonded nor screwed together. Rather, their one-piece technology construction enhances strength and eliminates chances of failure under pressure for greater safety and performance. Optimized 3D Hydro Mechanics engineered into the lower part of the nozzle chamber prevent pressure in the upper part of the nozzle and eliminate the possibility of an explosion in a sewer line or manhole. The threaded nozzle inserts are replaceable and are made of stainless steel or ceramic. They can be used in conjunction with recycled water. 877-864-9394; www.sewerproshop.com.