Core & Four Collection
This collection centers around the Domestic Natural Gas Handbook, which compiles all domestic chapters from the ViperGas Technical Manuals into over 600 pages of detailed technical content. Presented in durable A5 twin ring binders, it supports ACS training with the latest specifications from key industry bodies.
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Over 425,000 copies sold and trusted by more than 120 UK and Ireland training centers
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Used by installers, inspectors, assessors, and trainers
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Supported by the ViperGas Stay Safe program offering automatic updates with an active subscription
Included ACS Preparation Workbooks:
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CCN1/CMA1: Domestic Core Gas Safety
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CENWAT: Domestic Central Heating and Water Heating Appliances
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CKR1: Domestic Cookers
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HTR1: Domestic Gas Fires and Wall Heater
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MET1/MET2: Domestic Low Pressure Gas Meters
Ideal for gas engineers and trainees aiming for comprehensive preparation across core domestic gas topics.




