The Johnson Controls V48AC-2C THREE WAY Pressure ACT Water Regulating Valve; 3/4″ 145/190# R-22; 3/4″ npt, 145 to 190 PSI Opening Point Range of Normally Closed Side, Cast Brass Three-Way Pressure Actuated Water Regulating Valve with 30″ Capillary with 1/4″ Flare Nut (Style 45) Pressure Element