BoilerBuddy · parts reference
Identify the part you're looking at.
Match what's on your boiler to the part you read about in a guide or symptom page. Eight calm, annotated illustrations — pressure gauge, relief valve, pilot light, condensate pipe, thermistor, diverter valve, the PRV discharge pipe, and the display panel — each with a one-line plain-English description and a quick line for when to stop and call a Gas Safe engineer.
The eight to recognise first
Eight parts to recognise first.
Tap a tile for the annotated illustration, the one-line plain-English description, and the line for when the part is past the safe-at-home DIY boundary. Deep-link from any guide or symptom page via /parts#<slug>.
Guidance only — when in doubt, a registered Gas Safe engineer makes the final call. This page is a visual reference and is not affiliated with any boiler manufacturer.