The three-way cock can not generate the off-state and the safe running boiler can be ensured .

本 三 通 旋塞不会产生截止状态，可确保锅炉安全运行。

The three-way cock can be used in the urban living gaspipe network and can also be used for the water heater in particular to back control water heater .

可用于城市生活煤气管网中，也可用于热水器，特别适用于后 制式热水器。