Abstract: A tap for sterilising water, the tap comprising an inlet, a source of ultraviolet radiation, a sterilisation zone and an outlet, the outlet consisting of one aperture through which the water exits the device, wherein the source of UV radiation is positioned in the sterilisation zone such that substantially all of the internal surfaces of the outlet portion can be directly irradiated by the source of ultraviolet radiation, and wherein the source of ultraviolet radiation and the aperture are arranged such that no ultraviolet radiation can be transmitted directly from the source of ultraviolet radiation through the aperture to leave the device.

Abstract: A device (2) for sterilizing a fluid comprising a sterilization zone (4) having an outlet portion (10), comprising at least one aperture (16) through which the fluid may exit the device (2), wherein the sterilization zone (4) is arranged to be irradiated by a source of ultraviolet radiation (18) such that substantially all of the internal surfaces of the outlet portion (10) are directly irradiated by the source of ultraviolet radiation (18) and wherein the source of ultraviolet radiation (18) and the at least one aperture (16) are arranged such that substantially no ultraviolet radiation may be transmitted directly from the source of ultraviolet radiation (18) through the at least one aperture (16). Preferably the device (2) comprises a shower unit. There is also disclosed a method of sterilizing a fluid.