1" Threaded Cast Iron Flo Check Valve
Mfr Part#: 220-6
Taco Universal Flo-Checks are designed for use in hot water heating systems to prevent gravity circulation when the boiler is operating, but the space heating zone is not wanted. Taco Flo-Check allows to use the heating boiler for domestic hot water throughout the whole year. In systems with multiple circulator zones, Flo-Cheks allow heat to flow only into the zones that are calling for heat. Also, the thumb screw can be manually opened for gravity feed appplications if the main circulator stops operating.
Maximum Operating Pressure: 125 PSI (862 kPa)
I have a two zone hot water heating system using two circulators and no flow control valves. At the point where the hot water splits from the one pipe coming from the boiler to two pipes going to the two heating zones, there is a Taco 220 in only one of those pipes. Is there supposed to be a Taco 220 in both lines instead of just one.
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If your system has been installed this way and is operating properly, there's no need for the 2nd valve.
Answered on 12/5/2012 by PexUniverse Customer Service