What to do if the heating exhaust valve leaks
With the advent of winter, the frequency of heating use increases, and leakage of exhaust valves has become a common problem in many households. This article will give you a detailed introduction to the causes, solutions and preventive measures of leakage in the exhaust valve to help you quickly deal with this problem.
1. Common causes of water leakage in heating exhaust valves

| Reason | Description |
|---|---|
| Valve aging | Long-term use results in wear of sealing rings or corrosion of metal parts |
| Water pressure is too high | System pressure exceeds the exhaust valve's tolerance range |
| Improper installation | The valve is not tightened or the sealing material is insufficient |
| Impurities clog | Impurities in the water block the valve, preventing it from closing completely |
2. Emergency handling steps
1.Turn off heating system: First, close the main heating valve to prevent continued water leakage.
2.Prepare water receiving tools: Use a towel or bucket to catch leaks to avoid soaking the floor.
3.Check the location of the leak: Confirm whether the valve body or the connection is leaking.
4.temporary seal: Waterproof tape can be used to wrap the leakage point (only minor leakage).
| Tools | Purpose |
|---|---|
| adjustable wrench | Disassemble valve |
| raw material belt | Thread seal |
| New exhaust valve | Replace damaged parts |
| screwdriver | Clean the valve core |
3. Professional maintenance methods
1.Replace sealing ring: Applicable to the condition that the valve body is intact:
- Shut down the system and relieve pressure
- Remove the screws on the top of the valve
- Replace the sealing ring with the same specification
2.Whole valve replacement: When the valve is seriously damaged:
- Measure the original valve size (common ones are 1/2", 3/4")
- Choose copper or all stainless steel valves
- Wrap 15-20 turns of raw material tape before installation
4. Preventive measures
| measures | Implementation method | cycle |
|---|---|---|
| Exhaust gas regularly | Operated once a month during heating season | monthly |
| water quality treatment | Install a filter or add a corrosion inhibitor | every year |
| Pressure detection | Maintain system pressure 1.5-2bar | weekly |
5. Things to note
1. Before processing, be sure toTurn off heating systemAnd wait for the water temperature to drop to prevent burns.
2. If water leakage is accompanied byLarge amounts of rust or black sewage, it is recommended to contact professionals for system cleaning.
3. Residents of high-rise buildings are advised to let the property management handle the problem, which involves the pressure balance of the entire heating system.
4. Pay attention when replacing valvesDistinguish between automatic exhaust valve and manual exhaust valve, the two structures are different.
6. Maintenance cost reference
| Project | Material fee | Labor cost |
|---|---|---|
| Replace sealing ring | 5-20 yuan | 50-100 yuan |
| Replace ordinary valve | 30-80 yuan | 80-150 yuan |
| Replace automatic exhaust valve | 100-300 yuan | 150-200 yuan |
Through the above methods, most exhaust valve leakage problems can be effectively solved. If you encounter complex situations, it is recommended to contact professional HVAC maintenance personnel in time to ensure the safe operation of the heating system.
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