For those with a Heatline c 24 boiler, please be aware of an issue with the water drain pipe (I am a layman so perhaps not the correct name) we had an issue with the boiler failing to stay alight for heating and hot water for a few seconds. Turned out after taking it apart that the condensed water outflow hose was completely blocked with rotten metal as the base of the pipe that the rubber hose connected had perished. Fortunately the plumber managed to fit in a piece of copper pipe to replace it and moulded some Evo Stik metal putty (something I suggested) which stands heat up to 150 degrees. It seemed to work but I was told this wouldn't be a permanent solution . I am just shocked that a metal pipe on a 8 year old boiler should rot so quickly. Very poor design and the cost of a replacement tank would be over £400 which seems excessive. I was advised that perhaps budget for a new boiler like a Glow worm as parts are very cheap. Just a bit gutted as the Heatline is pretty much mint condition in all other areas as we keep it serviced every year. The only thing it does do is run at maximum bar when heating is on but no longer drops below the lowest bar threshold like it used to.