Tapped into my water supply by going into a cold water supply the same as you would connect your washing machine to.. Didnt want the self taping unit because i live in a rented house.
If you get a few spare mins could you explain how you did this, I also live in a rented house which is why I don't have a RO unit but if there is a clean way of doing it then I can.
/cgi.ebay.co.uk/Water-Filter-RO-Inlet-Tap-Connector-Push-Fit-3-4-1-4-/380115033411?pt=UK_HGKitchen_SmallApp_RL&hash=item58809f1d43#ht_880wt_1135
cant get an easier connection that that
will fit on an outside tap and a washing machine valve under your sink.
I got a little yellow rock Goby and a very small Scopas tang 

Now Im not sure...