All PVC SCH 40/STD white fittings shall be produced by Spears® Manufacturing Company from PVC Type I cell classification 12454, conforming to ASTM D1784. All injection molded PVC SCH 40/STD white fittings shall be certified for potable water service by NSF® International and manufactured in strict compliance to ASTM D 2466. All fabricated fittings shall be produced in accordance with Spears® General Specifications for Fabricated Fittings. Spears® Union, Fitting/Connector Type: Union, 4 in Nominal, Socket, 4-5/8 in Length, SCH 40/STD, Molded, PVC, Buna-N O-Ring Seal, White, Domestic