| 摘要 |
A sprinkler head assembly comprised of a base located at the upper end of a riser tube and which base carries a screen allowing for distribution of water. In accordance with the present invention, a control valve is located directly at the sprinkler head assembly. In one embodiment, the sprinkler head assembly may constitute a shrub or stationary head connected to the upper end of the riser tube. In this embodiment, the control valve would be preferably located in the body of the base of the stationary sprinkler head. In another embodiment, the sprinkler head assembly constitutes a pop-up sprinkler head and the control valve would be located in the pop-up shaft forming part of that sprinkler head. In still another embodiment of the invention, a retrofit coupling or adapter may be provided and which would be located between a riser tube and a sprinkler head forming part of that assembly. In this case, the adaptive coupling would include the control valve. In each case, water flow to the sprinkler head assembly may be temporarily interrupted to allow cleaning and repair or replacement of the sprinkler head from a point upstream of the insert, but yet in close proximity to that sprinkler head assembly.
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