I have the RO/DI unit from AquaFX -- the Barracuda. Which one do you have? I only have a 29 gallon tank so this suits my needs. This is how I do it: It just hooks up to my showerhead via a garden hose to shower head adapter (cant remember the actual size) This is the easiest hookup I have in my one bedroom apartment, the faucet in the kitchen doesn't fit any adapter I can find (plus my wife hates me using up the kitchen sink for hours). Question for you all-- the TDS of my tap water comes out at 257ppm, the TDS out of the RO membrane is 15ppm (it then comes out 0pmm after the DI. This roughly 94% effeciency, or rejection or whatever they call it. Is that good? I've had the RO membrane for a year and only make roughly 10 gallons a week.