MUELLER NIPPLE Item : Nipple Pipe Size : 1/4 Length : 5-1/2 Connection : NPT Material of Construction : Black Welded Steel Schedule : 40 WOG (PSI) : 300 At 150 Deg F Saturated Steam Pressure : 150 PSI Standards Class: 150 Standards : Class 150, ASTM-A-53 Type E or F, ASTM A-733, WWN 351