Pressure describes the system
Repeated pressure loss can have more than one cause. The boiler, accessible fittings and concealed heating pipework all need the appropriate consideration. The useful next step depends on what has already been checked and how the pressure changes.
Keep appliance work with the right professional
Boiler covers and internal components are not part of a homeowner investigation. A suitably qualified engineer should assess appliance-related possibilities. If those findings point towards concealed pipework, share them when arranging a specialist leak visit.
Explain the pattern you have noticed
Say whether loss is gradual, linked to heating use or follows recent work. Mention separate heating zones and underfloor circuits. This history supports the choice of suitable isolation and tracing. Repeatedly adding water should not be mistaken for identifying or repairing the cause.
Related service
Central heating leak detection explains the practical investigation and the scope to discuss before booking.
For agreed residential work, the Exact Source package is £1,400, including applicable tax. Necessary access, plumbing repair, materials, suitable checks and a Trace & Access report are included. Decorative and remedial reinstatement is excluded.