Patent ID: 7975328

Claim:
An upward discharge waste device for a shower tray, the waste device comprising a hollow housing having a waste water inlet, a waste water outlet and a waste water flow-channel between the waste water inlet and the waste water outlet, a perimeter edge of an interior surface of the housing defining in part the waste water inlet, the perimeter edge curving upwardly to the waste water outlet, wherein the flow-channel between the waste water inlet and the waste water outlet has a non-uniform transverse cross-sectional shape along a longitudinal extent from the waste water inlet and towards the waste water outlet, and a uniform or substantially uniform transverse cross-sectional area along the said longitudinal extent, the inlet and outlet defining a width therebetween, whereby a depth of the flow-channel increases as the width decreases in the direction from the inlet to the outlet to enable a substantially constant volume of water to be fed to the waste water outlet from the perimeter edge of the housing.