Boiler keeps losing pressure
Check the steps below first — if you\'re not confident, get it fixed safely today.
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Most likely cause & what to check
Topping up the boiler more than once a month means there is a leak somewhere — water doesn't disappear on its own in a sealed system.
Do a quick visual check: look at all visible radiator valves and pipe joints for any damp, rust staining, or white limescale marks. Also check the small pipe that exits outside (pressure relief valve discharge) for any dripping.
If you can't find anything obvious, call a Gas Safe engineer. Tell them: "My boiler keeps losing pressure and needs topping up regularly — I've checked for visible leaks but can't find anything."
🛠 Tools & materials you may need
Find a Gas Safe registered engineer near you and get it fixed properly.
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