A FLOW RESTRICTION DEVICE

摘要

Flow restriction insert (10) has a first sealing means (11) to sealingly engage with a valve seat in a tap, an internal chamber (13), an inlet (14) to allow fluid to flow into the chamber (13), an outlet (17) to allow fluid in the chamber (13) to flow out of the insert (10) and a valve seat (16) in the form of an annular flat top shoulder located in the chamber between inlet (14) and outlet (17). The valve seat (16) of the insert (10) is of smaller diameter than the valve seat of the tap, allowing a smaller diameter jumper valve (17) to be fitted. Flow restriction is provided by tangential slots (21) discharging through the sides of the cylinder, with additional restriction provided by perforations (20) in diffuser plate (28). The insert (10) can be placed in a conventional tap for water conservation and can reduce tap noise.