addition to the preferred pivot members and bias members disclosed it will be appreciated that a variety of other configurations can be employed for example while all bias members disclosed thus far have been coil springs it would be possible to utilize any of a variety of conventional known bias members including other types of springs elastomer members and even the fluid pressure from the water entering the device to bias the platform back to a predetermined initial state in which none of the valves of the plurality of assemblies 20a 20d are activated while the preferred embodiments disclosed mount the valves nozzles and hose coupling to the base any or all could be mounted to or supported from the platform with each valve or its actuator positioned between the platform and base to be moved when the platform pivots on the base over the appropriate pivot axis or axes thereby opening the valve while four straight uniformly sized shaped and positioned pivot members 18a 18d have been disclosed as preferred it should be appreciated that if pivot members are provided at all they are not limited to that arrangement in particular segmented pivot members straight and or curved less or more than four in number can be provided uniformly or differently shaped uniformly or asymmetrically positioned or spaced furthermore continuous pivoting structures can be provided if desired extending entirely and unbrokenly around the center of the base or platform fully polygonal symmetric or asymmetric fully curved symmetric or asymmetric or combined curved and straight sections continuously connected end to end while a movable engagement between the platform 14 and base 12 has been described thus far in terms of a preferred coupling of the platform to the base.