That's the ticket for your feed but if you're running the drain/concentrate line to a drain saddle it need to be air gapped to prevent bacteria from crawling back into your RO system.

Thank you Greg I will add those to the order when I place it. I guess I had better get on the group buy list lol.

Mine's setup on an otherwise unused bathroom sink, but could you please elaborate on this ?

By plumbing code it's technically a cross connection.Usage of that drain line doesn't matter since it's still connected to your sewer.On an RO for drinking water you'll find the tap is outfitted with a air gap.

An air gap is usually one inch above flood.for instance if your kitchen sink overflows that water never touches the spigot.

Sorry to highjack your thread:biggrin:

I think I follow
I gather you meant that the height of the hose in the saddle should be at or higher than the crown before the trap arm ? Right ?

I initially thought you were talking about how to put the hose into the saddle

Now you've got me thinking about having the RO waste line loop up above the saddle as I do rinse frozen food in this sink

I don't think we're hijacking as the OP is considering installing what we are talking about :wink:, and you already answered her initial question

Nope there actually need to be a break in the drain line one inch above the sink and then falls into the ABS drain by gravity.

Oh, I get ya now

You'd think RO suppliers would include an air gap assembly in their kits