Press Unions Application Natural Gas Non-Potable Water Propane Fitting Side A Connection Type Press-Fit Fitting Side B Connection Type Press-Fit Fitting Side A Copper Tube Size 1 1/2 in Fitting Side B Copper Tube Size 1 1/2 in Fitting Material Copper O-Ring Material HNBR Specific Fitting Shape Straight Union Fitting Side A Tube Outer Diameter 1 1/2 in Fitting Side B Tube Outer Diameter 1 1/2 in Overall Length 4 19/32 in Maximum Operating Pressure 200 psi