Webstone, a brand of NIBCO 1 in. SWT Thermostatic Mixing Valve, Temperature Lock Handle For Low Temp Hydronic Heat and Water Distribution Systems

The Thermostatic Mixing Valve (TMV) mixes cold and hot water to the desired output temperature suitable for the point of source (water heater). The forged brass body is outfitted with non-piloting union connections with integrated spring check valves, to streamline future service. It also features a temperature locking handle for added security.