Do you have a combi boiler or a system/regular boiler. You can tell the diffirence by the number of pipes under the boiler, if you have 6 copper pipes and no cylinder in an airing cupboard then you have a combi, if you have a cylinder in an airing cupboard and 3 pipes under the boiler then you have a system/regular boiler. To know this would be a start. Thanks
Bob the plumber, February 2009