Product review (1 stars): Wasted my money on this.
This fitting is not really universal. The hole for the RO drainage tube is tiny, I have worked with 5 different brands of RO system, and none of the under sink devices have been this small. Massively let down by this purchase - I guess this is what I get for buying online. I will buy everything in person from now on. The shipping on this product also doubles the price from about 7 dollars, to 15 - even though it weighs almost nothing and fits in an envelope.