Post by grg on Apr 26, 2018 7:02:40 GMT -5
New tubing is not expensive. I think I paid something like $6 for enough tubing to replumb my AR8Pro from an Ace Hardware store. Take an old piece to get the size right (I didn't - had to buy it twice ;-).
I only had an issue with twisting when I was installing the new lines. When I removed the old ones I just held the tubing with one hand and used a wrench on the fitting and I was able to prevent it from turning. But the new lines where much tighter in the fittings and I could not keep them from turning but I had not connected the other ends so it was not much of an issue. As far as flushing the system they recommend the distilled water to flush out the old and refill with the RV antifreeze. And since my unit is new and well within warranty I wont be doing anything else.
As far as removing used tubing (that you don't plan to reuse), a pair of needle nose pliers squeezing the tubing right above the fitting so you just barely pinch the top of the fitting and squeeze the tubing off, works pretty well. The tubing will not be reusable after this process, though. Caution, however, do not do this on the little radiator - those barbed entry/exit fittings are aluminum and will crush. I recommend slitting the tubing with a razor blade along the fitting to get it off the radiator to avoid damage.
On install, if the tubing is proving too much to get in place, just a little heat from a heat gun or a propane torch (held faaaar away) to warm the tubing up makes it slip on pretty easy. It really doesn't take much heat at all - just warm up the tubing.