Sold separately This 3/4 inch isolation pump flange is designed to facilitate circulator pump replacement or repairs while the integral purge port facilitates system purging. It features a swivel flange that allows the purge port to be positioned for optimal purging convenience, brass body and flange with a bottom loaded blowout proof stem, threaded NPT inlet and outlet and an adjustable packing gland. The pressure is rated 400 psi WOG and the maximum temperature is 406 F at 100 psi