Before closing the switch to allow electric current to flow to the heater, make certain that the heater is full of water and that the cold water inlet valve is open.
在打开电源开关之前，要确保热水器处于满水状态，冷水进水阀门处于开启状态。
The advantages of this valve are: body's diameter without grooves, the medium does not plug the card blocking, full-diameter flow characteristics, suitable for powder using in the pipeline.
此阀门的优点在于阀体通径无凹槽，介质不会卡阻堵塞，并且具有全通径流通特性，适合粉体颗粒介质的管道中使用。
The advantages of this valve are: body's diameter without grooves, the medium does not plug the card blocking, full-diameter flow characteristics, suitable for powder using in the pipeline.
此阀门的优点在于阀体通径无凹槽，介质不会卡阻堵塞，并且具有全通径流通特性，适合粉体颗粒介质的管道中使用。
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