SPECIFICATION DATA FLOW FORM LARGE DIAMETER XFF SERIES == 6.2in Dia— 7.5in 48In [ return’ flow 19in 1.91n Crackpot Counters: . 3.5 in min 19in 19in Test pressure: 174 P.S.L Pedestal Base Max working pressure: 100 P.S.I. Max working temperature : 200 °F This radiator may only be installed horizontally on the floor. Connections: 1/2 inch BSP underside tapping, angle valves with 1 / 2 inch NPT female to pipe included. For closed loop hot water systems only. Not for use with domestic hot water system.