Feature

●The Replacement OmniFilter OK7 O-Ring Kit (also called OK7-DC6-S06, OK7-R-01, OK7-R-02, OK7-S6-05, OK7-DC6-S18) contains 2 different o-ring sizes to fix your leaking water system.
●This convenient 2 set package contains 2 of each size o-ring, for 4 o-ring gasket seals total.
●Compatible with: OmniFilter BF6, BF7, BF7a (BF7 Series A), BF35, BF36, BF36C, BF55, BF56, PB35, and PB55 water filter housings.
●Material: Buna-N (nitrile butadiene rubber)
●Manufactured and Warrantied by Captain O-Ring LLC, with decades of experience in the sealing and chemical industry.


Description

  • The Replacement OmniFilter OK7 O-Ring Kit (also called OK7-DC6-S06, OK7-R-01, OK7-R-02, OK7-S6-05, OK7-DC6-S18) contains 2 different o-ring sizes to fix your leaking water system.
  • This convenient 2 set package contains 2 of each size, for 4 o-ring gasket seals total.
  • Compatible with: OmniFilter BF6, BF7, BF7a (BF7 Series A), BF35, BF36, BF36C, BF55, BF56, PB35, and PB55 water filter housings.
  • Material: Buna-N (nitrile butadiene rubber)

Water Filter Housing CompatibilityWater Filter Housing Compatibility

Water Filter Housing Compatibility

Captain O-Rings replacement OK7 o-rings are compatible with the following filter housings:

  • OmniFilter BF6
  • OmniFilter BF7
  • OmniFilter BF7a (BF7 Series A)
  • OmniFilter BF35, BF36, & BF36C
  • OmniFilter BF55 & BF56
  • OmniFilter PB35 & PB55

Important, Please Read:

The Omnifilter OK7 kit includes two different o-ring sizes. This kit includes two of each size (four o-rings total). Some of the filter models on the compatibility list above use the smaller o-ring, and some use the larger o-ring. Some revisions of the same filter model will use the smaller o-ring, and some revisions within the same model number will use the larger o-ring. For example, if you have BF6 or BF36 filter housing (or one of the other models on the list), your housing may use either one of these o-ring sizes depending upon the date it was manufactured. Please make sure to try both o-ring sizes in the kit to confirm the correct one that fits your housing.

Frequently Asked Water Filter O-Ring Questions

How often do I need to change my filter housing's o-ring?How often do I need to change my filter housing's o-ring?

Can I use grease or lubricant on these o-rings?Can I use grease or lubricant on these o-rings?

What if I don't know what o-ring part number my filter housing needs?What if I don't know what o-ring part number my filter housing needs?

How often do I need to change my filter housings o-ring?

Captain O-Rings high quality replacement water filter housing o-rings are designed for reliable extended use. Still, it is typically recommended to replace your o-ring on every third filter change to ensure it is in top shape to prevent leaks.

Can I use grease or lubricant on these o-rings?

Since Captain O-Ring supplies high quality o-rings without surface imperfections or tacky/sticky surface texture, lubrication is typically not needed if the filter housing sealing surfaces are clean and free of debris. Simply wet the o-rings with water before installing. However, if lubrication is preferred, these Buna Nitrile rubber o-rings are compatible with silicone based and petroleum based lubricants, as well as natural lubricants like vegetable oil.

What if I dont know what o-ring part number my filter housing needs?

Not sure which o-ring part number you need for your filter housing? Use our handy printable water filter housing o-ring size chart. Simply print out the chart and lay your old o-ring on the page to see which o-ring it matches with. You can find the size chart listed as "User Guide [PDF]" under the "Product guides and documents" section or the "downloads" section on this page, depending on your Amazon page layout.

Product guides and documents

User Guide (PDF)