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Your cart is empty.This O-RING-SET contains three 3.5" standard industry size O-RINGs to prevent leaks when you change your RO filters. Standard under sink reverse osmosis system. Recommend to change all O-RINGs once you've opened the housing. Lubricate with clean lubricant and place in grooves below threads to protect against water leaks.
Dannette Steck
Reviewed in the United States on March 17, 2025
Perfect for our needs
Mike T
Reviewed in the United States on January 26, 2025
Would buy again. Fit well in my RO sumps and good quality thickness.
Guy_in_IL
Reviewed in the United States on December 30, 2024
Worked on my krystalpure system that is 18 years old.
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