In most homes in the united kingdom (uk), you will typically find a heating system that employs a central boiler heating unit and a separate device for water heating. How do i use drain out bathroom for maintenance and prevention purposes? The typical boiler has a life expectancy of. Have any problems with your water mains? Stahl plumbing, heating & air conditioning is staffed with certified master plumbers providing emergency service hours a day, days a week you never know when a plumbing.