In my fish room I'm lucky to have the main water line and the house waste drain in the same spot. All suggestions I've read point to hooking up the ro/di in a restroom by a sink etc. Has anyone connected directly to the main water line of the house? How? I'd prefer to not do a saddle valve on the main. Same question for the pvc waste like of the house, can I connect to that directly? Here's where it all comes in (see attached pic)