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If the tubing isn't as flexible anymore, is flaking, or is turning brittle enough to crack.....replace the tubing. Just my $.02
The next tubing will just yellow as well. As long as it is not cracked open I'd just run the vinegar through it and call it a day.
How do get vinager to run through it? I assume you disconect both ends of the hose, have power turned off, as well as clamp the H20? Or is there another way?
Wrong Grasshopper! Remember how ozone works! It creates a vacuum in the line (venturi) which draws the ozone from the ozone generator. Therefore, you simply disconnect the hose at the ozone generator while everything is running and stick it into a cup of vinegar that you place on the floor of the equipment area and it draws the vinegar into the line just as it drew the ozone.
Turn power off, unplug tube from the suck thingy on the bottom of the ozonator, take 10 oz glass of white vinegar (not Mexican vinegar), put tube in glass, restore power, wait until all vinegar is sucked, replace tube, drink beer. Piece of pie!Terminator
HotSpring Owner's Manual1. Disconnect power to the spa2. Access the equipment compartment3. Locate the tube that turns yellow and connects to the suck thingy on bottom of ozonator.4. Place 16 ounces of white vinegar into a cup...blah blah blahGo back to working on your Phoenix Premium spas, you ain't no spa technician!Terminator