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    • #273718
      Avatar photoAnonymous

        what is the best way to hook up the drain line from an r/o unit to the drain under the sink? Is an air gap required? If so what is the best way to attach an air gap? Does it have to be higher than the sink in case of a stopped up drain so the water doesn’t leak out of the air gap? Any info will be appreciated.

      • #288375
        Avatar photofourth year

          The drain connection fitting is included with the RO unit and the air gap is part of the faucet in the majority of units.

        • #288376
          Avatar photodaveroconn

            The minimum air gap required for residential RO systems is 1″ above the sink. These are part of the RO systems faucet and have three connections. 1/4″ drain from the RO, 3/8″ or 1/4″ product line from the RO, and the 3/8″ return from the air gap to the drain. The best way to ensure that the water runs freely to the drain is to take the most direct route too it. Try not to leave any sags in the 3/8″ line from the RO faucet. You could also use this product that gives you a better flow into drain pipe check out these two web sites.
            http://www.ecotech-dla.com/ http://www.roconn.com
            David F. Walling

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