I have a little bigger setup but to save a few bucks I didn't use the mounting clips. Not to just save money but also to prevent drowning and to allow weanlings access. I used a soldering iron and melted a hole in the tub just big enough that the water nozzel fits in snugly. If the nozzel leaks it won't fill the tub to the top and kill your rats and the babies can reach it easier. Also I recommend the other water nozzels rbi has. They don't seem to drip like those do and are cheaper. However if you use the other nozzel I recommend getting a rebuild kit or buy a couple extras just to have on hand. If one does start to leak you won't have to wait 2 days to get one or pay shipping again. I used a square kitty litter bucket for my resivor and used the quick connect bucket adaptor. That's pretty easiy. Drill hole use clear silicone calking and screw the fitting in. Its been in service for over a year and no problems yet. And btw almost positive you need the L fitting on the bottom tub. Not sure how that would work out using a T unless you are running another line off of it.