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The Importance of a Gas Registered Engineer In the UK, engineers and plumbers must be Gas Safe registered in order to work with gas. This is crucial because carbon monoxide poisoning, faulty central heating systems and boiler installations kill thousands of people every year. To become Gas Safe registered, engineers must prove their qualifications and competence. This is accomplished through passing exams. Once they pass the assessment, they will receive a probationary registration status. You can also find more about the requirements for a q