I had some (what I thought was) 1/4" polyethylene RO tubing from Home Depot. I noticed that it's slightly smaller in diameter than the tube that came with the unit. I put it on my RO unit and the quick connects are all leaking where this new tubing is used. They are fully inserted.
The tube has REHAU RAU-PE printed on it. It's white and translucent. I Googled it and found this...
https://www.rehau.com/download/14654...-rau-pe-en.pdf
Does anyone know if there are different standards or sizes?