The Wags (water and gas shutoff) valve is a simple, inexpensive, and reliable way to guard against disastrous water problems that can arise when water heaters develop a leak. The valve, which can be used for new or existing water heaters, is totally mechanical and can be installed with or without an electric harness.
So exactly how does the TEV help the unit achieve higher efficiency? In this article we will answer this question and provide some basic knowledge of TEV operation on residential unitary a/c applications.