Yep youll need an RO and meter anyway but youll only need a merlin ro....fits in your house if needs and attaches to outside/kitchen tap you dont need flashy units in garages etc. But youll still need a resin cylinder to polish of after your ro. I used to have a tucker 700ltr system back in 2003 but now have 400 ltr system as it does the same amount of windows etc due to small diameter hose and flow controllers etc
Steve