Hello All, The picture is of a flange that connects an iron and copper pipe (hot water heater) which has started leaking a few drops. The rust seems to be on the edge of the flange and the iron pipe. The flange is probably soldered to the copper pipe side(?). I would appreciate any opinions on whether this is a DIY job or better to get a professional. Also, any idea of how much cost I should anticipate ( I live in the SF bay area) if I go the latter route. Thanks very much for any info!