Brass Unloader Check Valve/ END ITEM IDENTIFICATION: 4920-01-126-2039 VALVE OPERATION METHOD: AUTOMATIC CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS OPENING PRESSURE SETTING: 105.0 POUNDS PER SQUARE INCH SPECIAL FEATURES: 0.750 IN. HEX BY 1.562 IN. LG MATERIAL: COPPER ALLOY BODY MEDIA FOR WHICH DESIGNED: AIR SINGLE RESPONSE STYLE DESIGNATOR: C7 STRAIGHT THRU