? fix a leak at seal where cistern is penitrated by the Overflow pipe?

You will need to turn off water, flush the toilet, spounge out any remaining water, hold the overflow tube inside the cistern,undo the plastic nut at the underside slacken the nut connecting the overflow tube to the overflow pipe remove the tube fit new rubber washer, check that the securing nut isn't split. Relace in reverse order

Pete
March 2008