Air can enter a boiler system through various means, most commonly through leaks within the system.
Common Ways Air Enters a Boiler System:
Here's a breakdown of the ways air can get into your boiler, with a special emphasis on leaks:
- Leaks in the System:
- As noted in the reference, a leak in the system is a primary cause of air ingress.
- These leaks can originate from:
- Loose Fittings: Connections that aren't properly tightened can allow air to be drawn into the system as the water circulates.
- Cracked Pipes: Over time, pipes can crack due to pressure changes or corrosion. These cracks provide pathways for air to enter.
- Holes in Seals: Deteriorated or damaged seals around various components can also create entry points for air.
- Incorrect Installation or Maintenance:
- Poorly installed or maintained systems can have inherent air entry points.
- For instance, improper initial filling of the system may not fully purge air pockets.
- Water Replenishment:
- When water is added to the system, especially if done quickly, air may be introduced at the same time.
- Systems often require a specific filling process to minimize air introduction.
- Automatic Air Vents Malfunction:
- Air vents are designed to release air. When they fail to work properly, the air won't be released from the system.
Impact of Air in the Boiler:
Air in the system can cause several issues:
- Reduced heating efficiency.
- Noises like gurgling or banging.
- Corrosion of system components.
- Uneven heating throughout the property.
Addressing Air Issues:
To resolve issues caused by air, you can:
- Bleed radiators to release trapped air.
- Address leaks and faulty seals immediately.
- Ensure the system is properly filled and maintained.
- Check that the automatic air vents are functioning as they should.
| Cause | Description |
|---|---|
| Leaks in the system | The main reason, air gets drawn in via loose connections, cracks and holes. |
| Incorrect installation | Poorly installed systems have air pockets. |
| Water replenishment | When water is added quickly it can also bring air. |
| Automatic air vent problems | The air vents may not be working properly and won't release any air. |
