The term “mixing valve” has the general application of meaning any device in plumbing that controls the blend of hot and cold water to deliver mixed, or tempered, water downstream. In most cases, a mixing valve isn’t designed to provide comfort; it serves as a safety mechanism that will keep you from accidental scalding due to high water temperatures.
These safety valves automatically control the hot water temperature and may be centrally located to control flow to all outlets or installed at individual points of use. VMS stocks O.E.M. mixing valve parts from Leonard, Lawler, Powers, Symmons and others.