The Westlake Pipe & Fittings Reducing Tee, 4 x 4 x 3" Socket White PVC Schedule 40 is part number 401422.Corrosion resistant injection molded PVC pipe fittings, IPS sizes 1/4” through 12” produced to Schedule 40dimensions, for use at temperatures up to and including 140°F. Pressure rating varies with pipe size and temperature. Generally resistant to most acids, bases, salts, aliphatic solutions, oxidants and halogens.Features ASTM D-1784 - rigid poly (vinyl chloride) Not to be used in the hot or cold water distribution system in a dwelling maximum service temperature 140°F Do not use LASCO fittings for compressed air or gases Do not test PVC piping systems with compressed air or gases Do not use fittings with liquids not recommended by LASCO Specifications Brand: Westlake Part Number: 401422 Application: Commercial Please confirm the part number matches your existing equipment before ordering.