This 12-port PEX manifold is a must-have for any multi-purpose radiant heating system. It can easily control up to 2500 square ft of area, and acts as the heart of your radiant heating system. Zone control is highly effective with this device, allowing flows to particular zones, and restricting flows to others is the key to proper usage of a manifold. This manifold comes equipped with supply and return wings, containing adapters for 1/2 inch PEX tubing, flow meters, balancing valves, and outlets.