Stem Adapter Application Potable Water Fitting Side A Connection Type Tube Stem Fitting Side B Connection Type BSPT Fitting Side A Pipe Size 3/8 in Fitting Side B Pipe Size 3/8 in Fitting Side A Tube Outer Diameter 1/2 in Fitting Material Acetal Color Gray Maximum Operating Pressure 145 psi Maximum Operating Temperature 158 Degrees F Specific Fitting Shape Straight Adapter Standards NSF/ANSI 51 NSF/ANSI 61 Minimum Operating Temperature 68 Degrees F System of Measurement Imperial