How to ventilate and drain the radiator?

The method of radiator exhaust and drainage is: close the valve, prepare for drainage, and finally drain.

1, close the valve

We must first find the main return valve of home heating and close it, then find the branch inlet valves and close them one by one. When closing the valve, if the heating valve is handwheel or ball valve, there is usually an O letter on the surface of the valve, an arrow mark next to it, an S letter and an arrow mark.

You can turn the valve in the direction of the arrow with the letter S to close the valve. If it is a handle valve, then we turn the valve so that the handle of the valve is perpendicular to the heating pipe, which means it is closed.

Step 2 prepare for drainage

Everyone will open the radiator branch water supply valve that needs to be drained. Next, we will prepare towels, screwdrivers and other related tools, and put the basin under the radiator exhaust valve.

3. The last water

The radiator bleeder valve is a screw switch. After we find the air release valve, we first unscrew the safety of the air release valve, then put a towel under the air release valve in one hand and gently unscrew the air release valve with a screwdriver in the other, and water will flow out of the air release valve.

Precautions for exhaust and drainage of radiator

1, when the air pressure is not very high, the valve must not be opened too wide, otherwise it will cause the radiator to be half water, usually air, so it will never be exhausted.

2. The backwater valve must be opened smaller than the inlet valve to maintain the inlet pressure in the radiator.

3. Be careful not to screw off the exhaust valve when the radiator is deflated. If it is unscrewed carelessly, the water in the pipe will gush out. Don't worry at this time. Find a wooden chopstick, insert the sharpened end into the exhaust hole to avoid a lot of water leakage, and then go to the maintenance personnel for maintenance.