How to release air from floor heating
With the advent of winter, the frequency of use of floor heating has gradually increased, but many users have reported that the floor heating system has problems such as no heat or loud noise. This is usually caused by air accumulation in the pipes. Venting floor heating is a key step in solving this problem. This article will introduce in detail the correct method of venting floor heating, and attach relevant data for reference.
1. The necessity of venting floor heating

The air in the floor heating pipes will affect the circulation of hot water, causing the heating effect to decrease. The following are common symptoms of gas accumulation in floor heating pipes:
| Problem manifestation | Possible reasons |
|---|---|
| The floor heating is not hot or the area is not hot. | Air accumulation in pipes blocks the flow of hot water |
| There is the sound of water flowing in the pipe | Mixing of air and water creates noise |
| System pressure is unstable | Air compressibility causes pressure fluctuations |
2. Preparation of tools for floor heating deflation
Before starting to deflate, you need to prepare the following tools:
| Tool name | Purpose |
|---|---|
| Bleed valve key | For unscrewing the air release valve |
| bucket or towel | catch drained water |
| screwdriver | Assisted removal of manifold cover |
3. Specific steps for venting floor heating
The following is the detailed operation process for floor heating venting:
1.Turn off floor heating system: Make sure the floor heating is stopped to avoid high temperature burns.
2.Find the bleed valve: Usually located above the water distributor, it is a small screw-shaped valve.
3.Connect the bleed tube: Insert the deflation tube into the outlet of the deflation valve, and put the other end into the bucket.
4.Slowly unscrew the air release valve: Use the air release valve key to turn it counterclockwise. When you hear a "hissing" sound, it means the air is being discharged.
5.Watch the water flow: When the discharged water is continuous and has no bubbles, it means that the air has been exhausted, so close the valve.
6.Check pressure: Restart the floor heating and observe whether the system pressure returns to normal.
| steps | Things to note |
|---|---|
| Shut down the system | Avoid high temperature burns |
| Unscrew the air release valve | Move slowly to avoid splashing water |
| Check water flow | Make sure there are no air bubbles before closing the valve |
4. Frequently Asked Questions
1.What should I do if the floor heating is still not hot after deflating?
It may be that the pipe is blocked or the water pump is faulty. It is recommended to contact a professional to check.
2.What should I do if the water flows too much when deflating?
Close the valve immediately, check the water distributor for leaks, and replace the sealing ring if necessary.
3.How often does it need to be deflated?
Usually, it is enough to deflate 1-2 times in a heating season. Frequent deflation may damage the valve.
5. Summary
Venting floor heating is an important step to ensure the heating effect. The operation is simple but requires attention to details. Through the introduction of this article, I hope you can easily solve the problem of air accumulation in floor heating and enjoy a warm winter.
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