NAPCO Royal Pipe and Fittings DR35 gasketed sewer fittings are designed for maximum performance in the most demanding environments along with ease of installation. Heavy duty reducing branches utilizing a minimum of DR18 wall thickness are used in injection moulded 8", 10", and 12" tees, wyes and tee-wyes to reinforce the strength of important branch intersections. A robust, high performance gasket protects the system by preventing infiltration and ex-filtration. Special features are incorporated to facilitate assembly; an extended pre-alignment lead in which aids in the proper placement of pipe and fittings, and our square pipe stop which resists pipe push-through from over insertion. The branch socket design permits up to 5° of angular deflection