Nipple Application Air Natural Gas Oil Potable Water Steam Fitting Compatibility Class 150 Gravity Flow No Inside Diameter 3/4 in Material Red Brass Material Grade ASTM B43 Maximum Operating Pressure 240 psi @ 450 Degrees F Maximum Operating Temperature 400 Degrees F Maximum Steam Pressure 953 psi @ 300 Degrees F Metal Pipe Construction Seamless Minimum Operating Temperature -20 Degrees F Nominal Pipe Size 3/4 in Outside Diameter 1 1/16 in Overall Length 4 in