| 摘要 |
PROBLEM TO BE SOLVED: To provide a water supply tap enabling efficiently performing water supply to each cultivation area with a small loss of flowing water, having an air absorbing and discharging function and facilitating cleaning and checking an air absorbing and discharging function part. SOLUTION: This water supply tap 11 has a valve box 13 set on the upper end of a water supply pipe 12 rising in a vertical direction, a valve 14 opening and closing a water supply continuous open 17 set on the bottom of the valve box 13 and a valve shaft 15 moving the valve 14 in the shaft line direction of the water supply pipe 12. The valve shaft 15 is formed in a hollow tube shape to pass the valve 14 through the lower end of an inner passage 21 in the valve shaft and connect to a water pipe side. A float valve holding chamber 28 holding a float valve 29 in a vertically movable manner is set on the upper end of the valve shaft, and an upper air hole 33 to be blockaded through rising of the float valve 29 is set on the upper part of the float valve holding chamber 28. COPYRIGHT: (C)2006,JPO&NCIPI
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