McMaster 44605K494 Low Pressure Iron Pipe Union Connector, 1 NPT Female, Class 150, Octagon Body (sub for 44605K196) 74779802 CERCLA SARA Section 311 312 CERCLA SARA Section 311 312 Stainless Steel Liquid Pressure Range 10 Union Fitting Connection NPT Female Pipe Size 1" Pressure Class 150 Body Shape Octagon Material Iron Maximum Pressure @ Temperature 300 psi @ 72°F Maximum Steam Pressure @ Temperature 150 psi @ 350°F Gasket Included Yes Gasket Material Brass Certification UL Listed For Pipe Schedule 40 For Use With Air Union Fitting — Union fittings separate into three pieces so you can access your line without unthreading pipe connections