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Topping up a central heating boiler

A central heating boiler is an essential part of your heating system. To ensure it works optimally, it is important to regularly maintain the boiler

A central heating boiler is an essential part of your heating system. To ensure it operates optimally, it is important to top it up regularly. But how do you actually do that?

In short
  • The water pressure in your central heating boiler should be within a specific range, usually between 1 and 2 bar.
  • Insufficient water pressure can lead to lower heating performance and even damage to the boiler.
  • Topping up the central heating boiler is a relatively simple process, but it is essential to do it correctly.
± 15 yrslifespan
1–2 yearsmaintenance interval
A-brandsIntergas · Remeha · Nefit

Why top up the central heating boiler

The central heating boiler requires a certain amount of water to function properly. If the water pressure is too low, this can lead to reduced heating performance and even damage to the boiler. That is why it is important to top up the boiler regularly.

Technician working on a central heating boiler

How to top up the central heating boiler

Topping up the central heating boiler is a relatively simple process. First, you must check that the boiler is switched off. Then, you can open the filling valve and add water until the desired pressure is reached. It is essential to check the water pressure while topping up to prevent the pressure from becoming too high.

Tips and precautions

Ensure that you only top up the central heating boiler when it is switched off. It is also recommended to use a pressure gauge to check the water pressure. If you are unsure about how to top up the central heating boiler, you can always contact a specialist such as Energie Install.

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Frequently asked questions

What happens if I do not top up the central heating boiler

If you do not top up the central heating boiler, this can lead to reduced heating performance and even damage to the boiler.

How often should I top up the central heating boiler

The frequency with which you need to top up the central heating boiler depends on various factors, such as the type of boiler and usage. In general, it is recommended to top up the boiler every 1 to 2 months.

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