ERA Piping Systems, PVC Pipe Fitting ,90° Elbow, US4E02, Schedule 40 (ASTM D2466) , NSF-pw & UPC System of PVC Fitting SCH40 Reducing Male Adaptor : SCH40 pressure fitting is easy to install and has better sound deadening qualities than PVC DWV fittings.n(1) The surface hardness and tensile strength of the pipe are excellent, and the pipeline safety factor is high.n(2) It has good aging resistance and its normal service life can reach more than 50 years.n(3) The pipeline has excellent corrosion resistance to inorganic acids, alkalis, and salts, and is suitable for industrial sewage discharge and transportation.n(4) The friction coefficient of the pipeline is small, the water flow is smooth, it is not easy to be blocked, and the maintenance workload is small.n(5) The material has a high oxygen index and is self-extinguishing.n(6) The linear expansion coefficient of the pipeline is small, 0.07mm/℃, and the deformation affected by temperature is small. The thermal conductivity and elastic modulus are small, and compared with cast iron drainage pipes, they have excellent freezing resistance.n(7) Bonding can be used to connect pipes and pipe fittings. The construction method is simple, the operation is convenient, and the installation efficiency is high.n(8) Good water tightness: The installation of PVC-U pipes, whether bonded or rubber ring connected, has good water tightness.