Abstract: A rotary indexing nozzle head is provided wherein a dome like structure includes a rotating nozzle part supported by bearings interiorly thereof. The exit portion of the nozzle member includes a flexible bellows like structure which expands under the influence of water pressure and causes a lip thereon to engage an appropriately spaced wall for holding the nozzle in a specific location until the water pressure is relieved whereupon the bellows structure contracts and removes the engaging lip from the adjacent wall. A nozzle is caused to index by the jet of water impinging upon the curved surface of the lip 34 thereby causing the nozzle member to move sidewise, that is to say rotationally, until the lip is moved out far enough by the water pressure to cause the lip to engage the adjacent wall of the dome. The walls of the dome are spaced around its periphery so as in effect to provide openings for the jet of water to come through.

Abstract: A fluid routing device has a sealed self-contained body which includes all of the working parts of such a device is combined with a base plate having discharge ports which register with outlets in the sealed body which are controlled by valves within that body, means for sealingly, but releasably, attaching the base plate to the body and the body to the conduit to a source of fluid under pressure are also included. The disclosure also teaches a method of servicing devices in a swimming pool system including the steps of providing in the device a sealed self-contained releasable body portion containing the moving parts, removing a malfunctioning sealed body portion and replacing it with a new functioning sealed body portion.