Domestic Gas Diploma (Gas Training)Including realistic work environment

Who is it suitable for?

The Domestic Gas Diploma is a gas training course specifically developed and designed for those wishing to enter the gas industry but do not necessarily have relevant experience or qualifications.

Applicants will be required to gain and provide evidence of a range of relevant gas work experience under the supervision of a Gas Safe registered Gas Safe Registered Company or Installer.

Upon successful completion of the training and on-site portfolio candidates will be at the correct-level to progress to the Accreditation Certification Scheme (ACS) gas assessment course.

The Domestic Gas Diploma is a pre-requisite to undertake Accreditation Certification Scheme (ACS) gas assessments and become a Gas Safe Registered engineer.


What’s involved?

The Domestic Gas Diploma includes 40* days of training in the following areas:
• Legislation, Health and Safety
• Combustion and its controls
• Chimney Systems
• Ventilation
• Pressure, Flow, Tightness testing and Purging
• Domestic Pipework Installation
• Electrical Systems, Controls and Components
• Heating Design, Heat Loss and Comfort Conditions
• Installation and Servicing of Domestic Central Heating and Hot Water Appliances
• Installation and Servicing of Domestic Cooking Appliances
• Principles and Procedures for Fault Diagnosis

* Training includes self-study and will be reduced accordingly in the event of recognition of prior learning.

Candidates are required to achieve a portfolio of evidence. The guided learning time for completion is estimated at 65 working days.
This course includes a selection of 'Realistic Work Environment'. Therefore if all portfolio evidence is unable to be achieved and completed within the workplace (onsite) under the Supervision of a Gas Safe Registered company or mentor. Moor Training can simulate up to a maximum of 2 jobs per task criteria (most task criteria is to be evidenced 5 times) in a 'Realistic Work Environment' allowing you to achieve the portfolio requirements and job opportunities in the centre, with a maximum of 5 days spend gaining the evidence via 'Realistic Work'.


The domestic gas safety relates to ‘domestic’ natural gas installations, with:

  • Maximum Operating Pressure (MOP) at the outlet of the ECV of 2 bar (medium pressure)
  • Operating pressure at the outlet of the gas meter of nominally 21 mbar (low pressure)
  • Gas pipework maximum bore of 35 mm (DN32, R 1¼)
  • Maximum Installation Volume (IV) of 0.035 m³
  • Maximum rated capacity through the primary meter of 16 m³/h and
  • Gas appliances having a maximum individual heat input of no greater then 70 kW net.

If the scope worked on is above that listed, this course is not suitable. Working on gas exceeding this must be undertaken via a commercial course. Undertaking without a commercial qualification/Gas Safe registration is illegal.


Where might it lead?

On successful completion of the Domestic Gas Diploma course candidates will receive a training ‘Competence Certificate’ consisting core gas and the appliances contained within their portfolio for the industry recognised Gas Diploma, which is necessary to access Accreditation Certificate Scheme (ACS) gas assessments for Core Domestic Gas Safety (CCN1) and appliances undertaken and listed on the ‘Competence Certificate’.


45* days


£4600.00 (+VAT)

Entry Requirements

Applicants must have access to carry out gas work alongside a Gas Safe Registered Company or Installer.
A reasonable level of English and Maths is advantageous. 

Delivery Method

A mixture of theory and practical training, along with homework and self-study.
'Realistic Work Environment' training and assessments will be provided by Moor Training.


Units will be assessed via practical and theory assessments.

'Realistic Work Environment' will be observed.

Portfolio's will be internally assessed and externally verified.


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With purpose-built workshops and experienced tutors, Moor Training will prepare you for a long and lucrative career in plumbing and gas installation.


  • Free & Secure parking
  • Modern, purpose-built, well equipped centre
  • Industry recognised, premium quality training
  • Express certification
  • Sociable, friendly atmosphere
  • Knowledgeable staff providing reassurance and great customer service
  • Apprenticeships with job opportunities throughout the South West 


Ask one of our team
call 01837 659357