Unvented hot water training is a requirement for plumbers that want to work on unvented hot water systems.
We offer Initial and Re-assessments!

Our Hot Water Systems and Safety (HWSS) course has been updated due to the recently revised G3 Building Regulation. The HWSS course replaces the unvented hot water course, and covers all hot water systems including unvented hot water systems training.


The initial assessment is designed for operatives who do not have an up to date Unvented Hot Water Systems certificate. Re-assessment is for candidates whose qualification has expired within the last 12 months.


You will study the following units:

  • Installation and safety
  • Regulations, standards and guidelines
  • Theory of hot water expansion
  • Principles of hot water storage
  • Design considerations
  • Components and function
  • Safety controls, discharge and integration
  • Maintenance and servicing

Entry Requirements

– Experience in the installation of domestic hot & cold vented and unvented water systems
– Hold one Department for Communities and Local Government (DCLG) recognised competency in a conventional fuel.

For those in the plumbing field, an NVQ Level 2 or equivalent qualification or experience is required.