The AB-40 features a brass body and a "combo connection" which allows either a threaded or sweat copper connection with the same union tail piece. The AB-40 also includes a check valve and provides an inbuilt bypass for rapid filling, high pressure testing and system purging....
A thermostatic by-pass valve, the Boiler 3-Way Thermostatic Valve (ESBE VTC Thermic Valve) is used for regulating the return or supply out of water in a hydronic heating system. The Boiler 3-Way Thermostatic Valve gives protection to the...
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