What should I do if there is a sound of running water from the radiator? ——Cause analysis and solution guide
With the arrival of the winter heating season, many families begin to use radiators for heating. However, many users report that the radiator makes a "squeaking" sound of running water, which not only affects the quietness of the home, but may also hide system problems. This article will analyze the common causes of running water noise and provide detailed solutions to help you quickly eliminate the noise.
1. Common causes of the sound of running water in radiators

| Reason type | Specific performance | probability of occurrence |
|---|---|---|
| There is air in the pipe | Intermittent "gurgling" sound, accompanied by local lack of heat | More than 60% |
| water flow too fast | Continuous high-frequency running water sound, obvious when the valve opening is too large | 20%-30% |
| Impurity accumulation | Irregular "rustling" noises mostly occur in old systems | 10%-15% |
| Mechanical looseness | The sound of metal clashing accompanied by the sound of running water | Below 5% |
2. Targeted solutions
1. Exhaust operation (for air problems)
Step 1: Close the main valve of the heating system and wait 5 minutes for the water flow to stop.
Step 2: Use a screwdriver to unscrew the exhaust valve on the top of the radiator (usually located on the side or back) counterclockwise.
Step 3: Keep turning it on after hearing the "hissing" exhaust sound, and turn it off immediately after the water comes out stably.
Step 4: Reopen the main valve and check if the sound disappears.
2. Adjust water flow speed
• Locate the regulating valve at the heating water inlet pipe
• Turn the valve slowly clockwise and observe that the pressure gauge remains at 1.5-2.0bar
• Test different gears to find the balance point with the least noise
3. System cleaning (professional operation)
| Cleaning method | Applicable scenarios | cost estimate |
|---|---|---|
| chemical cleaning | The system has not been maintained for more than 5 years | 300-500 yuan |
| Pulse cleaning | Newly installed system blocked by impurities | 200-400 yuan |
3. Preventive measures
•Annual maintenance:Before the heating season, ask professionals to do a system pressure test and exhaust
•Water quality treatment:Installing a magnetic filter can reduce impurity accumulation by 80%
•Correct use:Avoid turning the heating on and off frequently and keep the water temperature stable at 60-70℃
4. Emergency handling
When the following conditions occur, you need to stop using it immediately and report for repair:
1. The sound of running water is accompanied by violent vibrations
2. The radiator does not heat up locally for more than 24 hours.
3. There are signs of water seepage on the ground
5. User self-examination flow chart
The sound of running water appears → Check the temperature of all radiators → Confirm whether the local area is not hot →
↓Yes → Perform exhaust operation ↓No → Check valve opening →
↓Still exists after adjustment → Contact professional maintenance
Through the above systematic analysis and solutions, most radiator water noise problems can be effectively solved. It is recommended that users establish regular maintenance files for heating equipment and record each maintenance situation, which is crucial to extending the life of the system. If the problem is still not solved after 3 self-treatments, there may be a hidden engineering problem that requires professional leak detection equipment.
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