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Water Filter O-Ring Replacements

While they may seem like a trivial part of a water filter system, water filter o-rings are one of the most important pieces of your water filter system.  They prevent leaks and allow your water filter to do what it was meant to do, filter your water.  O-rings on your water filter system should be replaced every 2 filter changes to help protect your water filter system from leaks. 

Not sure, of the correct O-ring size for your water filter system, open the filter housing and measure the diameter of the existing O-ring. Still can’t figure out what size o-ring you need for your water filter system, give our experts a call, 1-800-277-3458 They’d be happy to help.  Note: the O-ring size is not related to the filter, but rather to the filter housing.

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  1. 151254 Pentek Filter Housing Sump O-Ring

    151254 Pentek Filter Housing Sump O-Ring

    Fits #10 and #20 Big Clear housings by Pentek and American Plumber, as well as other manufacturers Learn More
    $6.19 Retail Price:  $9.42
  2. 143339 Pentek Head Nut Gasket

    143339 Pentek Head Nut Gasket

    Fits the Pentek ST stainless steel housing Learn More
    $6.99 Retail Price:  $9.19
  3. OR-34 Tier1 O-Ring

    OR-34 Tier1 O-Ring

    Sized at 4 inches and fits into most standard whole house water filtration system housings Learn More
    $1.99 Retail Price:  $3.44
  4. OR-100 Tier1 Lubricated O-Ring

    OR-100 Tier1 Lubricated O-Ring

    Fits into 10 and 20 inch Big Blue water filtration system housings Learn More
    $3.99 Retail Price:  $5.74
  5. 151117 Pentek Viton Polypropylene Housing O-Ring

    151117 Pentek Viton Polypropylene Housing O-Ring

    Fits Pentek 150150, 150132, 150154, 150134, 150156, 150135, 150158 and 150141 Water Filter Housings Learn More
    $7.99 Retail Price:  $11.49
  6. OR-237-S Pentek O-Ring

    OR-237-S Pentek O-Ring

    Fits Pentek #5 and Slim Line housings Learn More
    $8.49 Retail Price:  $12.06
  7. OR-241-B Pentek O-Ring

    OR-241-B Pentek O-Ring

    Fits into Pentek water filtration system housings #10, #12 and #20 Learn More
    $4.09 Retail Price:  $7.00
  8. OR-241-S Pentek O-Ring

    OR-241-S Pentek O-Ring

    Fits Pentek housings #10, #12 and #20 Learn More
    $9.59 Retail Price:  $13.33
  9. OR-BB Pentek O-Ring

    OR-BB Pentek O-Ring

    Fits into Pentek Big Blue filtration system housings Learn More
    $8.99 Retail Price:  $11.49

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