Explain why your boiler pressure keeps dropping in plain terms

The pressure gauge keeps sliding down and you have no idea if that is normal wear or a sign something is about to go badly wrong. This explains, without any plumbing jargon, what usually causes slow pressure loss, what makes it urgent, and what you can safely check yourself before ringing anyone. For anyone standing in front of a boiler feeling out of their depth.

A boiler's pressure gauge should normally sit between 1 and 2 bar when the heating is cold. If yours keeps creeping down over days or weeks and you have to keep topping it up, explain to a complete beginner, with no assumed knowledge of plumbing, what is likely going on and what counts as an emergency versus a job for the next routine service. Describe {SYMPTOM_DETAILS}, meaning what the user has noticed: how often they top up, whether they hear hissing, see damp patches, or notice pressure drop only when the heating is running versus all the time. Explain in plain language what commonly causes slow pressure loss (a small leak somewhere in the system, a faulty pressure relief valve, or air needing to be bled from radiators), what would make it urgent (visible water, a burning smell, or pressure dropping in under a day), and what the user can safely check themselves before calling anyone out. End with one clear sentence telling the user whether to call a professional now or monitor for a few more days.