When starting a new boiler installation here at SJL Plumbing we always chemical power flush the central heating system before the new boiler goes in, There are some situations that may stop us from doing this like the old boiler is leaking but that still wont stop us. As you can see from the picture to the right we also use a giant magnet to catch all the magnatight which is running around you system.

power flush
Power flush machine

To the right is an external oil combi boiler, The manufacturer is Warmflow and this is one of their new Agentis Pro external combi oil boilers. It is the only combi boiler that is AA rated on the market and it comes with a 5 year warranty out the box, But at Sjl Plumbing we can now offer a 10 year warranty on this boiler as we are a Platinum Installer for Warmflow.

Yes a 10 year warranty for peace of mind when looking at a new boiler.

External combi boiler