a spray device for use as a supplementary fluid output , having a mixing chamber for receiving and mixing fluid from two input supplies which supplies mixed fluid to a spray head through a flexible conduit . the relative proportions of input supplies received in the mixing chamber is controlled by a mix controller having a mix actuator which is connected to a mix valve associated with the mixing chamber by an upstanding rotatable sleeve . the spray device is mounted on a hole in a work surface by mounting means . the flexible conduit and the upstanding rotatable sleeve pass through the hole in the work surface and a bore in the mounting means . the mix controller may control the rate of fluid flow through the device .