Kurt is an absolutely excellent plumber and a wonderful human being besides! Blocked or broken derby drains. Wondering about how energy efficient your new boiler will really be? Want more stories like this? visit. Better boilers, mayor sadiq khan's £m scheme to help people stay warm and save on their energy bills. Commonly entered via an apprenticeship in plumbing or heating and ventilation these take two - three years to complete level or college courses in plumbing (full or part-time) or heating.