1-1/4 inch Brass The Isolator 4041 Ball Valve. nominal Size, IPS x Flange, 600 PSI WOG, 100 degree Fahrenheit, Full Port, Media: Water/Glycol Mixture, Lever Handle Actuator, HCP Brass Ball, 4-7/16 inch inlet to Outlet Length, 2-7/8 inch Top to inlet Center