I use Home Depots 5/8 ID clear tubing ($10) for this 5/8 Co2 line. It fit snugly on the connector and twisted. I had a small leak after installation due to a bent hose. I straightened the hose and it stopped flowing. I would say that my pipe is not as thick as it should be, which can cause a slight leak during installation. It took a few days to build up the co2. I have noticed that fewer injections are required. Went from 2-3 bubbles per second to less than 1 bubble per second. Good product. If there are any problems, I'll update my review!
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