ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,640, issued on March 4, was assigned to Watts Regulator Co. (North Andover, Mass.).

"Tankless water heater isolation valve assembly" was invented by James Erhardt (Bedford, N.H.) and Mahyar Esmaili (Wilmot, N.H.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An isolation valve assembly comprises a valve body defining a first fluid port and a second fluid port opposing the first fluid port and at least one drain port disposed between the first fluid port and the second fluid port, an isolation valve disposed within the valve body and a handle operatively coupled to the isolation valve. The handle is movable to cause corresponding movement of the isol...