We fit magnetic filters as standard on all of our installations, unless specifically requested by you, although we would advise against this. The reason being the magnet helps catch all the dirt and debris floating around before it enters your boiler.
This helps to improve reliability and cut breakdowns, as well as helping with energy efficiency. The biggest factor with regards to the reliability of your boiler is magnetite or black sludge as it is more commonly known. This is the most common cause of all internal boiler failures. The black sludge is a type of iron oxide (rust) that wears down and blocks boiler components. Having a filter installed helps prevent unwanted breakdowns and improves reliability.