Watts Regulator Co. has added 1-1/4" and 1-1/2" sizes to its sweat model IPF isolation pump flanges. These new sizes expand the Series IPF's availability to 1/2" to 1-1/2" with sweat end connections and 1/2" to 2" with threaded end connections. The flanges are designed to isolate circulator pumps to facilitate pump replacement or repairs. They fit most circulator pumps and install directly to the circulator pump flange using less piping than traditional installations. The Series IPF features a two-piece brass body and flange design with virgin PTFE seats and quarter-turn open or close operation. The flanges are pressure-rated at 600 wog, with a maximum operating temperature of 406