We’d advise switching off the boiler, and calling an emergency plumber to rectify the problem. Don’t let a leaking faucet raise your water bill we’ll provide a solution on the first try! You need a plumber to fault find your central heating system, and determine where the leak is coming from. Got a tip, kitchen tour, or other story our readers should see? Non-combustion wastes are generated from activities related to operating boilers and are typically released.