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The heated water, is delivered from the Manifold into the floor via the Manifold’s Flow Rail and after circulating the floor circuits, the water re-enters the Manifold via the Return Rail. The Return Rail features Circuit Valves that are commonly mounted with Actuators which open and close when instructed by the thermostat (via the Wiring Centre) – thus allowing water flow into the floor circuits and warming up or cooling down the underfloor heating system.

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