Domestic Gas Safety Manual – Combined Core & Appliance



This is made up of two A5 manuals: Core Domestic Gas Safety and Appliance Specific Gas Safety.

Covering core gas safety and gas appliances generally worked on by the majority of engineers, this manual, which consists of 20 technical modules, will help prepare individuals to confidently undertake the ACS assessments for these activities. Complete with a series of sample questions, and model answers, to test your knowledge before completing the ACS assessments which will enable you to apply for Gas Safe registration. The manual can also be used as a reference guide for already qualified gas engineers.

The Core Domestic Gas Safety Modules are:

Module 1 – Gas Safety Legislation
Module 2 – Gas Emergency Actions and Procedures
Module 3 – Characteristics of Combustion
Module 4 – Ventilation
Module 5 – Installation of Pipework and Fittings
Module 6 – Testing for Tightness
Module 7 – Checking and/or Setting Meter Regulators
Module 8 – Identification of Unsafe Situations, Emergency Notices and Warning Labels
Module 9 – The Operation and Positioning of Emergency Isolation Controls and Valves
Module 10 – Checking and Setting Appliance Burner Pressures and Gas Rates
Module 11 – The Operation and Checking of Appliance Gas Safety Devices and Controls
Module 12 – Chimney Standards
Module 13 – Chimney Flue Testing
Module 14 – Installation of Open, Balanced and Fan Assisted Chimney Configurations
Module 15 – Re-establishing Gas Supplies and Re-lighting Appliances
Module 16 – Knowledge Questions and Model Answers

The Appliance Specific Gas Safety modules are:

Module 17 – Domestic Central Heating and Water Heaters (CENWAT)
Module 18 – Domestic Cookers (CKR1)
Module 19 – Domestic Space Heaters, Gas Fires and Wall Heaters (HTR1)
Module 20 – Domestic Warm Air (DAH1)


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