Your fittings may come with a blue snap ring/clip (shaped like a C, used for locking the tube so it doesn't move). C ring is not a necessary part and will not affect the RO system
C ring must be removed before you insert the tube. 
This listing contain 20 PC C-ring/clip
20 clips C ring clip for quick fitting connector lock
- Product Code: PT-C clip
- Availability: In Stock
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$3.00
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