| 摘要 |
PROBLEM TO BE SOLVED: To provide fire extinguishing equipment with a check valve hardly allowing the remaining of dead water inside a line by automatically draining residual water after water conduction. SOLUTION: In this fire extinguishing equipment, the line 5 has the check valve 10 including a main valve element closing a water passage port when running water is absent inside the line 5, and a drain valve opening a drain port when the running water is absent inside the line 5. In the check valve 10, the drain valve closes the drain port interlockingly with the main valve element when the main valve element opens the water passage port by the running water.
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