Boiler pressure dropping daily—Any Ideas?

Pressure dropping every day usually points to one of two things: a leak somewhere in the system or an issue with the boiler itself. First thing I’d do is check all your radiators and pipework for any drips or damp spots. Sometimes the tiniest leak can cause the pressure to drop over time.

If you can’t see anything obvious, it might be the pressure relief valve or the expansion vessel. Have a look outside where the boiler’s overflow pipe is—if that’s dripping, the pressure relief valve might be letting water out. The expansion vessel could also be the culprit if it’s not holding pressure properly.

If you’re not comfortable digging into it yourself, I’d say get a gas-safe engineer to have a look. Boilers can be tricky, and it’s better to be safe than sorry.

Good luck with it, and let us know how you get on!

Cheers!

Sounds like your boiler’s pressure dropping is either down to a leak somewhere or an issue with one of the boiler’s components. I’d start by having a proper look at all the radiators, valves, and visible pipework for any signs of a leak. Even a small drip can make the pressure drop steadily over time.

If you don’t spot anything, it could be the pressure relief valve letting water escape—check the overflow pipe outside to see if it’s dripping. Another possibility is the expansion vessel not working as it should, which might need recharging or replacing.

If you’re not confident tackling it yourself, it’s worth calling a gas-safe engineer to take a look. Better to get it sorted properly than risk causing more problems.

Let us know how you get on!