This works perfectly with my GS3 plumbed in. Thanks Caffewerks for the quick and easy recommendations.
After searching high and low to find an adapter for the water line on a La Marzocco GS3, this was the one part we needed to connect it to a pex water line for using with the Simple Cart System. Additionally, many RO water systems use pex tubing in this size, so going back and forth between portable cart mode and in-line water is a breeze.
I had such trouble finding a John Guest Push Fit accessory to fit my waterline connected to my La Marzocco Espresso Machine. After numerous emails and many purchases from other companies, I was super thankful for Zachary and his diligence in leading me directly to what I needed. Very pleased!
This a rare find, it took me forever to locate one that's available let alone readily available. I tried other big box online stores but none has it. Many support staff simply don't know enough. This is the one if you need to connect directly to a 3/8 water line. The 9/16" UNEF is the key and is extremely rare. No other will work. This works for some big name under the sink system filtration system.