I have two two-faucet glycol-cooled towers about 50 or so feet from our beer locker. We are looking to replace the existing (i.e. really old) trunk line that serves them. Can I run a single 4-product x 2 glycol line and split it apart at the bar? The product lines are straightforward...the question is the glycol. Can I just put a T in both the up and downstream lines to create two loops? Or do I have to have a separate trunk/pair of glycol lines for the 2nd tower? Mind you, these towers are within 6 to 8 feet of each other. Was wondering about back pressure on the downstream T.