Decided today to change all of my dosing lines for colour coded RO tubing. I was struggling to know what hose was what on my system and if I ever had to ask somebody to help me out it would have surely ended in disaster. Took an age to change over but much happier with the result. I also used 90 degree elbows to attach the lines to the hose holders as the old hoses were getting pinched too much and it was messing with the dosing a bit. I still have the middle DOS left hand side to change to black tomorrow.