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Domestic Gas Meters


This gas safety assessment is designed to test the gas safety competency of an engineer in MET1. Training and assessment is carried out to Test competencies in the installation, commissioning, exchange and removal of domestic gas meters.

Range of meters covered – Primary or secondary meters of capacity up to and including 6 m3 /h. Operatives installing meters with a higher supply pressure, between 75 mbar – 2 bar, will additionally require the REGT1 assessment.

MET1 training will often be done as part of a package alongside your CCN1 domestic ACS gas qualification. Common add-ons alongside MET1 include:

• CCN1 – Domestic core gas safety
• CKR1 – Domestic Gas Cooking Appliances
• HTR1 – Domestic Space Heaters (including Gas Fires and Wall Heaters)
• DAH1 – Domestic warm air heaters
• REGT1 – Domestic medium pressure meter regulators
• CPA1 – Combustion performance
• CMDDA – C0/C02 Atmosphere and appliance testing

Commercial/industrial engineers can undertake MET1 ACS, without the need for CCN1, but only if they encounter domestic-sized appliances within non-domestic premises.


Who is the course for?

This course is designed for anyone seeking Initial Assessment or Re-Assessment on MET1 ACS

Written Assessments

These consist of open-book written assessments. The Open Book assessments permit the use of approved reference material such as the Gastec manual to obtain answers.

The written assessment contains either multiple questions or true/false statements.

Practical Assessments

Workshop activities on live meters are required.

Practical Tests

Workshop activities on live meters required.


Before a candidate can be allowed to sit for the MET1 ACS assessment, they need to provide evidence of an in-date ACS gas core

Candidates must hold one of the following core qualifications as a pre-requisite for taking MET1 – 


Experienced gas fitting operatives seeking certificate renewal and/or assessment and certification to extend their work range.

Individuals with relevant gas experience, and other individuals with relevant qualifications and experience in similar job disciplines, for example:
plumbers and installers of piped gas other than LPG or Natural Gas engineers from the domestic oil industry, electrical appliance service engineers and marine engineers/fitters
heating and ventilation engineers and refrigeration engineers/fitters
Individuals from outside the United Kingdom who have relevant qualifications and experience.


Individuals without previous experience are entering the industry for the first time.

Upon receipt and verification of the Application for Certification and Assessment documents, UK Certification will be the body to award the certification issued for your personal use.

Course Schedule

This is a One Day course which is inclusive of half a day of training and half a day of assessments.


Gastec Training and Assessment Centres is a leading supplier of training and assessment services to the utilities industries. We have been providing training services at all levels for over 27 years.

We offer a full range of domestic and commercial gas courses all year round. Training and assessments are also available for heat pumps, electrical courses, oil, catering and solid fuel. Each course is structured to suit your needs and to meet the requirements that are mandatory for training and assessments within the respected industries including the gas safe register.

Our unrivaled state-of-the-art training and assessment centre is just off the M1 in Milton Keynes, easy to reach from London and the home counties. This purpose-built centre contains air-conditioned classrooms, smart board technology and a range of up-to-date appliances and facilities to make your time with us enjoyable, as well as productive.
With tailor-made modern workshops and facilities, a relaxed atmosphere and environment, you can be assured the learning experience will be pleasant and in-depth. Our staff are friendly and approachable, and each has in-depth industry knowledge and a wealth of practical experience which enables them to provide the very best levels of guidance and advice.


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