Compact. 1/4" NPTF. 18 SCFM rated flow. 5 oz. polycarbonate bowl. May be filled while system is under pressure. Transparent sight dome. 7.4 overall height. Maximum operating pressure 150 P.S.I. at 125 deg. F. Operating temperature range -10 deg. F. to +175 F. For pressures up to 250 P.S.I., metal replacement must be used.