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Three Port Valve


Motorised valve used in W -, and Y - Plan systems which will allow either the domestic hot water cylinder, and/or the radiator circuit to run. Because one or the other would be open to flow it is important that when underfloor heating is fitted to have a two port zone valve as a blocker valve. See below for specific types, and their operation.

 
See Also:Two Port Zone Valve
 Y Plan
 W Plan
 Diverter Valve
 Mid-position valve
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