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![20160116_132858[1].jpg 20160116_132858[1].jpg](https://ukplumbersforums.co.uk/data/attachments/20/20502-ac1095414600af3d21a26b4ba2adc395.jpg?hash=rBCVQUYArz)
i apologise for the quality of my pictures, but i was having an argument with the customer while taking them.
what they show is a DIYer who has cut into and adapted the flue of a combi boiler to combine the tumble drier out let with the boiler flue. while the boiler is on it sucks all the fluff from the tumble drier into the heat exchanger