A device is provided for increasing fluid pressure the device having a first conduit having a fluid inlet and outlet the first conduit provided with a non return valve and a second bypass conduit having bypass inlet and by pass outlet connected to the first conduit either side of the non return valve which bypass is provided with a pumping means. The pump may be sized such that the device can deliver a high pressure of fluid to a low flow rate demand outlet downstream thereof whilst the device allow a high flow rate demand downstream of the device to be supplied at low pressure as and when required resulting in a much cheaper more efficient and more durable pumping arrangement useable in several applications.
