I had a new boiler in August. Today I noticed that the condensate pipe has a slight drip where the pipe below the boiler (Worcester Bosch Greenstar) is joined to another which then goes through the wall to the outside. I'm tempted to repair this myself as no gas or electrics are involved; any recommendations? As the drips are hitting the floor I expect there will be some staining eventually. It's a very slow drip, only when the boiler is on of course.