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The Importance of a Gas Registered Engineer In the UK plumbers and engineers need to be Gas Safe registered in order to work with gas. This is important, because carbon monoxide poisoning and faulty central heating systems or boiler installations kill a lot of people each year. Engineers must prove their skills and competence in order to be Gas Safe registered. This is accomplished by passing assessments. If they pass the test, they will receive an interim registration status. Qualification Before an engineer can be able to work with gas, they must