The manifold is the central part of any underfloor heating system, where the pipework from each area converges, and where the supply of hot water from the heat source is fed/blended.Ambiente stainless steel manifolds are designed for use with hydronic underfloor heating systems. They can either be used in conjunction with a pump/blender unit, or coupled directly to the centrally blended/pumped heat source. The manifold is manufactured from pressed stainless steel, and is run through stringent testing procedures throughout the manufacturing process. Following completion, every manifold is tested to 6 bar pressure (typical operating pressure would be less than 3 bar). As standard the manifold comes with a manual air vent, which can easily be upgraded to an automatic version. A fill/drain point with hose connector is located on both the flow and return bar. Each loop on the flow bar has a flow meter, to clearly indicate the flow rate achieved in each loop these meters are used to balance the system at commissioning stage, as per the UFH design. Each loop on the return bar has a valve to open/close the loop this is normally controlled by an actuator valve, which responds to the call for heat from a room thermostat.