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Refs: |
不凍栓 1208
不凍水栓 112
機械工学英和和英辞典
freeze prevention drain valve
google suggests "freeze protection valve" when I googled "freeze prevention drain valve":
https://www.thermomegatech.com/freeze-protection-valves/
"Freeze protection valves are effective in preventing freeze damage in process lines. Unlike steam or electric tracing,
which require power and can cause water to overheat, freeze protection valves operate by simply draining or bleeding
water as the temperature approaches freezing."
特許庁 example(weblio) 不凍_水_栓: "ANTIFREEZING FAUCET"
https://www.city.komagane.nagano.jp/gyosei/kurashi_tetsuzuki/jogesuido/josuido/2480.html
"不凍栓は、水道の凍結を防止するために、水道管内の水を地中に排水する器具です。" |