Hex Bushing Malleable Iron Not Applicable ASTM A197 Class Class 150 For Pipe Schedule 40 4 in Male NPT Not Applicable Not Applicable 4 In.-8 1 1/2 in Female NPT Not Applicable Not Applicable 1 1/2 In.-11.5 Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable Not Applicable 300 psi Maximum Operating Pressure