Abstract: A water supply system and method for supplying water to a plurality of water utilization devices, particularly poultry drinkers, supported over a floor extending at a predetermined slope, includes a water supply conduit extending over and substantially parallel to the floor, and a plurality of pressure reducers in the water supply conduit at spaced intervals along its length. Each pressure reducer reduces the water pressure a predetermined amount according to the slope of the span of the water supply conduit from the respective pressure reducer to the next adjacent one upstream of the water supply conduit.