Boiler losing pressure? Common causes and how to fix them

Have you noticed that your boiler is losing pressure? This isn’t always a major concern. Boilers do lose pressure overtime and may need repressurising. You can do this using the filling tap underneath the boiler. However, if the boiler is constantly dropping in pressure, then there might be something wrong. Here are some of the key reasons.

A Leak

You can’t fix a leak yourself and you might not even notice the signs of a leak. The leak can be internal or there might be water dripping out. It depends which component has been damaged or is failing.

Alternatively, it’s possible that the pipes connected to your boiler are leaking. If you think this might be the case, check the pipes, paying particular attention to the joints and bends. This is where the pipes are the most vulnerable.

Bled Radiators

It’s quite common for the pressure of a boiler to drop after recently bleeding the radiators. You can fix this by repressurising the boiler using the filling taps. Just make sure that you do shut them off once the pressure reaches the right point.

Damaged Expansion Vessel

If your expansion vessel is damaged the pressure will rise when the boiler heats up and then the pressure relief valve lets out the excess, causing a drop. This issue can be avoided if you have a regular boiler inspection.

We hope this helps you understand some of the key reasons why your boiler might be losing pressure constantly and the solutions that you should try. Remember, if you do spot an issue here, it’s always worth consulting an expert. They could save you from an expensive repair in the future.

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