Abstract: An irrigation apparatus for parks, golf courses, acreages, sports fields, school yards, etc., is mounted on a small trailer. It includes a sprayer head of the impulse type, a self-priming centrifugal pump for supplying water under pressure to the sprayer head and an engine for driving the pump. A hose carried by the trailer is connected to the pump inlet and may be used to supply water to the pump from a lake, stream or a water line. Where a pressurized water supply is available, the pump may be used to boost the pressure and provide improved coverage and a better misting action. If the existing pressure is high enough, it can be connected to a direct inlet to the sprayer.