Unvented Cylinder Service


Unvented water heaters are safe to use if installed and maintained correctly though an annual service.

Our engineer will carry out the following works on the service

  • Expansion relief valve testing
  • Temperature and pressure relief valve testing
  • Storage tank draining as needed
  • Combination valve/pressure reduction valve stripping and line strainer cleaning
  • Pressure expansion vessel check (if so equipped)
  • Expansion vessel pressure top up
  • Leak check
  • Main and boost immersion heater and thermostat function testing
  • Main and boost immersion heater resistance check
  • Service record completion and signing

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