Key Features

• 4 Pack of o-rings (also called gaskets or seals) compatible with APEC Ultimate and Essence RO Reverse Osmosis Drinking Water Systems.
• Version A (P/N: O-RING-SET) is compatible with APEC ESSENCE RO units made before June, 2013 and ULTIMATE RO units made before May 2015. Version B (P/N: O-RING-SET-B) is compatible with APEC ESSENCE RO units made after June, 2013 and ULTIMATE RO units made after May 2015 (see images for more info).
• Compatible with APEC Reverse Osmosis Filter Housing Models: RO-45, RO-90, RO-PERM, RO-PUMP, ROES-50, ROES-PH75, ROES-UV75, ROES-UV75-55 and ROES-PHUV75.
• O-Rings measure approximately 3.5” diameter and are slightly over 1/8” thick. Version A and B are very similar in size, but vary slightly (Version B is slightly smaller than Version A). Check the info above and images to determine which version you need for your system.
• Molded from Buna-N rubber for long lasting performance and reliability. Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA!

Specifications