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| 1. When the pneumatic fitting cannot grip the PTFE tube securely, it needs to be replaced. | 2. Use an adjustable wrench to loosen the fitting by turning it counterclockwise. | 3. Then, unscrew it the rest of the way by hand. |
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| 4. Remove the old fitting. | 5. Screw in the new fitting clockwise. | 6. Insert the PTFE tube all the way into the new fitting. |
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| 7. Gently pull the tube upward. | 8. If it doesn't come out, the replacement is successful. |
If you have any further questions, please contact service@aoseed.com for assistance.