What needs to be clarified
Compare pressure changes, heating and the actual water exit point to examine the protective assembly and supply arrangement without presuming valve failure.
Materials to prepare
- Heater manual and installed valve identification
- Cold supply diagram showing the check valve and expansion device
- Heating log, outlet photographs and specialist access
What to compare
A specialist distinguishes intended discharge from a leaking joint and records pressure and temperature under agreed operating conditions. Assembly specifications are compared with documentation, including check valve and expansion device locations. Observations are timed against heating and draw-off; protective functions remain active throughout testing.
Possible outcome of the analysis
Possible deliverables include a pressure timeline and assembly diagram evaluating supported explanations, with further measurements and specialist equipment checks specified where access is incomplete.
Limits of the conclusions
Discharge during heating alone does not prove valve failure. A single pressure reading cannot represent the entire cycle, and concealed supply piping limits verification.