install RO system

can't get a pic to post. the top of the unit is marked in and out. in is from the water supply, out goes to the center of the faucet that came with the ro. if you have an airgap faucet it will have 2 extra tubes on the bottom of it. the skinny tube connect to the top of the unibody, ( control looking thing, middle canister) usually 1/4 " line. the thicker tube 3/8" is the drain from the air gap faucet and needs to be connected to a drain. the other connection is from the storage tank to the unibody, probably the only tube left 3/8" . Joe