US 12,241,640 B2
Tankless water heater isolation valve assembly
James Erhardt, Bedford, NH (US); and Mahyar Esmaili, Wilmot, NH (US)
Assigned to Watts Regulator Co., North Andover, MA (US)
Filed by Watts Regulator Co., North Andover, MA (US)
Filed on Jan. 17, 2023, as Appl. No. 18/097,761.
Application 18/097,761 is a continuation of application No. 17/314,819, filed on May 7, 2021, granted, now 11,603,995.
Claims priority of provisional application 63/024,571, filed on May 14, 2020.
Prior Publication US 2023/0151975 A1, May 18, 2023
Int. Cl. F24D 19/08 (2006.01); F16K 5/04 (2006.01); F16K 11/08 (2006.01); F16K 11/085 (2006.01); F24D 19/10 (2006.01)
CPC F24D 19/088 (2013.01) [F16K 11/085 (2013.01); F24D 19/1051 (2013.01); F16K 5/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An isolation valve assembly defining a fluid passage, which comprises:
a valve body defining a first fluid port comprising a fluid inlet port and a second fluid port comprising a fluid outlet 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 movable to cause corresponding movement of the isolation valve between a first normal position where the isolation valve fluidly couples the first fluid port and the second fluid port, and a second drain position where the isolation valve fluidly couples the first fluid port and the at least one drain port and isolates the second fluid port
wherein the isolation valve includes an outer plug seal portion at least partially circumscribing the fluid passage, the outer plug seal portion configured to seal the fluid outlet port in the second drain position of the isolation valve.