I will have my husband answer this later, as he was the one that plumbed ours in. If I remember correctly, you have to pierce a cold water pipe with a saddle valve( thats included) for water intake, and you also have to pierce the drain( ABOVE the bend in the pipe) to discharge. Both of these could be easily cut out and repaired with a coupling when you move. The unit comes with a little faucet, but we didnt install that. We just left a loop of pipe with a valve under the sink. We fill our water bottles and aquariums off of that.
The directions that come with the unit are written kinda oddly

but with common sense its an easy install.