I thought this might be helpful for those do it yourselfers who run into this issue. Save you some time.
1 1/4 " compression fitting available at your local hardware store, or plumbing supply shop. Ironically one plumbing supply shop when I told him what I was trying to do said he had no idea about connecting with Ikea plumbing. That's what prompted me to do this video. It's such a simple solution.
