A manifold system enclosed in an insulated box suitable for heating or chilled applications, incorporating isolation valves on the flow manifold and manual or motorised commissioning valves on the return. The arrangement also includes a strainer and blow down valve, a Differential Pressure Control Valve and a flushing bypass. Valves are available in ½” to 1” sizes and manifolds available up to 6 ports. Commissioning centres are handed to suit.