Hello there. I would like some information please. At the moment we are contemplating putting a conservatory on the back of our house to replace our old decking. I have done some research and we are not sure of the size we are going to have yet, but whatever size we do have the drain that runs in line with the main drain will either be covered by the base or be very close to the conservatory boundaries. Does the drain need to be moved or as some other people have suggested does the drain cover need to be replaced with a double seal cover. The foundations will not cover the drain cover or the run line but the base will. Any advice you can give me would be helpful. Many thanks for your help. 