recently installed a greenstar 28i worcester condensing boiler, experiencing problem with condensate coming back from either the condensate sump or the syphon seal area. note this installation has an extended 3M length flue with 1 45 elbow and plume management kit fitted

Euro tech Engineers David, March 2010

is it backing up into the boiler?
does it run ok with the condensate pipe detached below the boiler?

Ian, March 2010