What the sign can tell us
A repeated drop is worth describing, but it does not establish that the hidden heating pipes are at fault. Visible fittings and earlier boiler findings help direct the next investigation.
Useful details to record
Record when the reading changes, any boiler warning and recent radiator or valve work.
Include your postcode, the affected place and any earlier investigation. A concise history helps distinguish a repeating pattern from a one-off observation.
Where an investigation may begin
Get behind the pressure changes.
Central heating leak detectionKeep the next step proportionate
A symptom alone does not identify a faulty pipe. Suitable investigation connects the observation with a cause before access or repair is proposed. If findings point outside plumbing, the recommendation should reflect that.
If water is actively escaping
For immediate danger, keep away from unsafe areas and use the appropriate emergency or urgent assistance service. Website enquiries do not dispatch emergency help or guarantee an attendance time.
Read the active-water guidance