got my stuff from lowes. got a wye green splitter. got it in the garden area. then went to the plumbing area and got a hose bib with 1/4 compresion fitting. thats all you need. if u just got ur unit the instructions may be a lil confusing. so im gonna tell u what i did.
leave filters out. (di and the ro membrane) hook up water supply in and run the water out to the washer drain. then run the unit without filters for 10 min. after that turn off water. the look on top for the line going into the ro membrane canister. press in on the outer ring of the line and remove the line. then insert ro membrane. then open up the di canister and insert di resin. hook everything up and run unit for about 15 min that should make u about 2 gallons. throw that water away and your ready to start making ro/di water. hope this helps.
note: with filters out it will look like your not making much water. once u put in the filters that will all change.