Model 1049 Pilot Operated Vent Valve; Carbon Steel Body; 10" Inlet X 12" Outlet ASME Class 150# Rf Flanges; Epdm Soft Seats; Option 1: With Internal Sensing, SST Pilot Filter Element, Pilot;Exhaust Tubed To Main Valve Outlet; Epdm Actuator Diaphragm; 4.0" - 12.0" Wc; [[ERROR RETRIEVING VALUE FOR POSITION 9]]