These valves operate on electricity to automatically divert flow between ports. All can direct flow from the center-port inlet to either side-port outlet. Valves cannot shut off flow. They require a minimum pressure drop between the inlet and outlet for operation; the upstream pressure must be 10 psi greater than the downstream pressure. The actuator is directly mounted to the valve body to minimize movement and reduce wear.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.