What is the correct way to exhaust the old radiator?

The correct way to exhaust the old radiator is:

1. First, close the inlet valve and the return valve of the radiator to ensure that the radiator is closed.

2. Find the exhaust valve at the top of the radiator, usually a small metal valve.

3. Turn the exhaust valve counterclockwise with the exhaust key or wrench and open the valve.

When you hear the hiss of the exhaust valve or see the gas coming out, it means that the air in the radiator is being discharged.

5. Wait for a period of time until the gas discharged from the exhaust valve becomes water, indicating that the air in the radiator has been completely discharged.

6. Close the exhaust valve and rotate it clockwise to ensure that the valve is closed.

7. Open the radiator inlet valve and return valve, and restart the heating system.

By correctly exhausting the radiator, the normal operation of the heating system can be ensured and the heating effect of the radiator can be improved.