McMaster 4894K47 High Cycling Threaded Check Valve, Bronze, 1 2 NPT Female, Class 125, 2.87 Cv 494F51 375 gal sock Color Pattern Blue Neutralizing 375 gal sock Color Pattern Blue Neutralizing No For Use With Chemical or Metal Type Coolants Pressure 200 psi Specific Pipe Fitting Shape Adapter Fitting Side B Connection Type FNPT Minimum Operating Temperature 0 Degrees F Fitting Material Bronze Maximum Operating Temperature 250 Degrees F Fitting Shape Straight Fitting Side A Connection Type Press Fit Application Potable Water O Ring Material EPDM Maximum Operating Pressure 200 psi Operating Temperature Maximum 250 Degrees F Fitting Side 2 Connection Type FNPT For Media Type Potable Water Operating Temperature Minimum 0 Degrees F Operating Pressure Maximum 200 psi Fitting Side 1 Connection Type Press fit Connector Type Adapter Center Stop Type Dimple Center Stop Restrictions This product has been certified by a third party to be compliant with the “Safe Drinking Water Act” requirements for low lead in potable (human consumption drinking and cooking) and non potable water applications (non human consumption) and rapid flow reversal these valves withstand frequent opening and closing