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® 457-005, Union Fitting/Connector, 1/2 in Nominal, Socket End Style, 1-27/32 in Length, SCH 40/STD Schedule, Molded Method of Manufacture, PVC, Buna-N O-Ring Seal, White, Domestic/Import: Domestic