Can drain out bathroom be used in a toilet? View all plumbing and heating photos on. We have jobs paying higher than the average plumber salary! Grade d or above gcses, including maths and english would be an advantage. What does it do? should you switch your boiler to eco-mode? is it cheaper to fun than the standard setting? Are you a customer or the owner/manager of the business you’d like to add? From as little as working days arrange a date convenient.