| 摘要 |
A body member has a top opening recess and a depending stem having an external portion capable of removable engagement in one of the outlets of a fluid containing system of the type having a plurality of outlets, such as an underground lawn sprinkling system. The top opening recess has an integral valve stem therein which is in communication with a bore extending upwardly through the bottom of the stem. By connecting the body member into one of the outlets and connecting the valve stem to a source of air pressure, the system can be cleared of water through one or more of its other outlets.
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