Adjustable height sprinkler

摘要

An adjustable height sprinkler apparatus having three tubular portions telescopically received within each other. The base portion is buried vertically in the ground and connected to a source of water pressure at the lower end, the upper end being adjacent the earth's surface. A second tubular extension member is vertically positionable by telescopic displacement relative to the base member and includes a coupling for sealably retaining the extension member in the selected vertical position. A third tubular pop-up member is telescopically positioned in the extension member and slidable downwardly by gravity and displaced upwardly when water pressure is applied to the sprinkler, the pop-up member having an enlarged diameter portion at the upper end with means for attaching a sprinkler head. In the preferred embodiment the upper end of the tubular extension is in a plane displaced relative to the tubular axis and the lower surface of the enlarged portion of the pop-up member is in a similar displaced plane so that when water pressure ceases and the pop-up member falls downwardly, the planar surfaces engage each other to maintain a preselected angular relationship between the pop-up member and the extension member.