4" Butt Fusion TeePre-blended black high density virgin resin. Recognized by the Plastic Pipe Institute as having a PE3408 / PE4710 / PE100 rating and a Hydrostatic Design Basis of 1600 psi @ 73°F. This resin has a cell classification of 445574C* in accordance with ASTM D3350.Made in USA from pre-blended virgin materials. These fittings are availabe in various configurations and DR and are primarily intended for use in pressure piping applications.These fittings are compatible for heat fusion to any PE material made from a like or similar resin. Select sizes can be supplied with AWWA or FM marking. Designed for use on pipe conforming to ASTM F714, D2513, and D3035.