Hi, ive noticed that there is a very slow water leak from the return valve of my CB 28 Alpha Boiler. Do I need to replace this or is there a stop leak product I can use? The leak is coming our of the valve itself.
I Have an Alpha CB28 Combi Boiler which is doing a very strabge thing. If I turn on the central heating system it works a dream, however if I only want to get hot water out of the taps no go! What could it be and can I fix it myself?