Tankless water heater isolation valve assembly
US11603995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2021 |
| Grant date | Mar 14, 2023 |
| Priority date | — |
| Expiry date | Sep 23, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tankless water heater (TWH) isolation valve includes a valve body having a plug valve port, a TWH port, a water distribution system port and a drain port. A plug valve includes at least one plug seal. The plug valve is controlled by a rotatable plug valve handle. The plug valve is disposed through the plug valve port and within the valve body. The rotatable plug valve handle includes a first plug valve handle position and a different rotated second plug valve handle position. In a normal operating mode in the first plug valve handle position, the TWH port is fluidly coupled to both of the drain port and the water system distribution port. In a drain mode, the TWH port is fluidly coupled to the drain port, and the water system distribution port is closed to the TWH port as blocked by the plug seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.