Abstract: Interconnecting short plastic pipe segments, with at least one stub shaft molded onto each pipe segment. A polymer selected from one of the polyolefins, such as polypropylene, is the preferred plastic because of its resistance to chemical erosion and because polypropylene, unlike some other plastics, such as polyvinylchlorides, can be recycled. The pipe segments can be economically molded in segments of about one foot in length, and are rigidly held together by novel load-bearing clamps.

Abstract: A washer booth riser of interconnecting pipe sections and at least one spray nozzle connected to each pipe section. The pipe sections and nozzles can be integrally plastic molded to eliminate leaking between risers and spray nozzles. A polymer selected from one of the polyolefins, such as polypropylene, is used as the preferred molding plastic because of its physical properties which are desirable in a washer booth environment and because polypropylene, unlike other plastics used for washer booth risers, such as polyvinylchlorides, can be recycled. By making the risers in sections of about one foot each in length, each nozzle can be easily aligned to spray in any desired horizontal direction. The pipe sections are held together by quick connect and disconnect fastening apparatus.