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Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.

LOW PRICES and FAST SHIPPING SINCE 1999 !

99.5% Of All Items In Stock For Same Day Shipping!

O-Rings & Sealant

O-Rings & Sealant

Replacement O-rings For Slim Line, Big Blue And Standard Water Filter System Housings

Dow 111 Silicone Sealant And Lubricant For O-rings

If you do not know the correct O-ring size for your system, you will need to open the filter housing to measure the diameter of the O-ring. The same filters fit in different size filter housings using different size O-rings. The O-ring size is not tied to the filter, but to the filter housing.

  1. Vu-Flow NT 120S O-rings for 2 Inch Vu-Flow Reusable Sediment Screen Filters
    Vu-Flow NT 120S O-rings for 2 Inch Vu-Flow Screen Filters
    Vu-Flow NT 120S O-rings for 2 Inch Vu-Flow Screen Filters. Fits all NT and Combo Style Vu-Flow sand and sediment screen filters.
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    $8.99 Special Price $6.99 As low as $5.99
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  2. Vu-Flow NT 30S O-rings for 1 Inch Vu-Flow Screen Spindown Screen Water Filters
    Vu-Flow NT 30S O-rings for 1" Vu-Flow Screen Spindown Replacement Screen Water Filters
    Vu-Flow NT 30S O-rings for 1 Inch Vu-Flow Screen Spindown Screen Water Filters. Fits all NT and Combo Style VuFlow sand and sediment spindown screen water filters. Be sure to use Dow 111 silicone sealant on the o-ring to prevent leaks.
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    $8.99 Special Price $5.99 As low as $4.59
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  3. Vu-Flow NT 60S O-rings for 1 & 1 1/2 Inch VuFlow Spindown Screen Water Filters
    Vu-Flow NT 60S O-rings for 1 & 1 1/2 Inch Vu-Flow Screen Filters
    Vu-Flow NT 60S O-rings for 1 and 1 1/2" Vu-Flow Screen Filters. Fits all NT and Combo Style Vu-Flow sand and sediment screen filters.
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    $8.99 Special Price $6.99 As low as $5.49
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  4. JG Replacement O-ring
    John Guest Quick Connector Replacement O-Ring 1/4" - 5-Pack
    John Guest CP-R08I-S 1/4" Replacement O-ring - 5 PER PACK
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    $7.79 Special Price $4.99 As low as $3.99
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  5. JG Replacement O-ring
    John Guest Quick Connector Replacement O-rings 1/2" 5 -PACK
    John Guest CP-R081-S 1/2" Replacement O-ring- 5 PER PACK
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    $8.99 Special Price $5.99
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  6. JG Replacement O-ring
    John Guest Quick Connector Replacement O-Ring 3/8" - 5-Pack

    John Guest CP-R121-S 3/8" Replacement O-ring - 5 PER PACK

    John Guest Quick Connector Replacement O-Ring 3/8" - 5-Pack

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    $8.79 Special Price $5.49
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  7. GGN-SS-O-RING KIT for GGN-SS-CTF Stainless Steel Countertop Water Filter Systems
    GGN-SS-O-RING KIT for GGN-SS-CTF Stainless Steel Countertop Water Filter Systems

    GGN-SS-O-RING KIT for GGN-SS-CTF Stainless Steel Countertop Systems

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    $15.99 Special Price $11.99
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  8. GGN-SS-MEM-O-RING - Double O-Ring & Seal Kit- 1000
    GGN SS-MEM-O-Rings Double O-ring and seal kit for SSRO-215 SS RO system
    GGN-SS-MEM-O-Rings-Double O-ring and seal kit
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    $5.00
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  9. WFO-CB-Frig-O-ring- 1000
    WFO-CB-Frig-O-ring ORM20-0580-E70 O-Ring, Frigidaire ® WFCB / WF1CB Compatible Replacement O-Ring.

    WFO-CB-Frig-O-ring ORM20-0580-E70 O-Ring, Frigidaire ® WFCB / WF1CB Compatible Replacement O-Ring.

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    $12.99 Special Price $9.99
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  10. Aquatec-Merlin Adaptor 1/2'' to 3/4'' John Guest Disconnect with Buna-N-O-Ring-QJS-554-1000
    Aquatec 1/2" John Guest to 3/4" Quick Disconnect With Buna N O-ring For Merlin Reverse Osmosis System Pumps
    Aquatec 1/2" John Guest to 3/4" Quick Disconnect With Buna N O-ring For Merlin Pumps.
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    $12.99 Special Price $9.99
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  11. Replacement O-Ring for Countertop Filtration System - ( O-ring 239) - 1000
    Countertop Water Filter System Replacement O-ring 239 - #Countertop-o-ring

    Countertop Water Filter System Replacement O-ring 239 - #Countertop-o-ring

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    $6.99 Special Price $5.99
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  12. O-Ring-Import-10- 1000
    Water Filter Housing O-Ring - O.D. 90mm (3 3/4") I.D. 85mm (3 3/8") CS 5mm #o-ring-import-10 (HKF-1014WW)

    Water Filter O-Ring - O.D. 90mm (3 3/4") I.D. 85mm (3 3/8") CS 5mm #o-ring-import-10 - HKF-1014WW

    O-Ring - Be sure to use Dow 111 Silicone Sealant to help prevent leaks.

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    $4.99
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  13. Amway * ® Compatible Fit O-ring for Amway E-9225 Water Filter Systems
    Amway * ® Compatible Fit O-ring for Amway E-9225 Water Filter Systems
    Amway * ® Compatible Fit O-ring for Amway E-9225 and E-9230 Drinking Water Systems. 5" I.D. x 5 3/8" O.D. x 3/16" cross section or thickness. Remember to order Dow 111 o-ring silicone sealant to help prevent leaks.
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    $13.99 Special Price $9.99 As low as $6.99
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  14. AMWAY- VA-5436- O-Ring for E-9395 Compact System and 9396 Water Filter Cartridge- 1000
    Amway * ® VA-5436 Compatible Fit O-ring for E-9395 Compact Water Treatment System and 9396 Filter Cartridge
    Amway * ® Compatible VA-5436 Fit O-ring for E-9395 Compact Water Treatment System filter housing that ues the E-9396 replacement drinking water filter cartridge. 3 ¼" O.D. x 3 7/16" I.D. x 3/32" cross section or thickness. Use as a o-ring replacement for the Amway VA-5436 o-ring. Be sure to order Dow 111 o-ring silicone sealant to help prevent leaks.

    Be Sure To Order Dow 111 Silicone Sealant To Help Prevent Leaks!

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    $12.99 Special Price $9.99 As low as $5.99
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  15. AquaPure Drinking Water Filter Housing O-ring #63597174 by 3M CUNO
    AquaPure Drinking Water Filter Housing O-ring #63597174 by 3M Purification
    AquaPure Drinking Water Filter Housing O-ring #63597174 by 3M Purification. Keep your system from leaking and causing expensive damages by replacing your o-rings every other time you change your water filters. Be sure to order Dow 111 silicone sealant so the o-rings will seal properly. Never use petroleum based greases such as Vasoline. Use the best sealant, use Dow 111 silicone.
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    $8.99 Special Price $4.99 As low as $3.29
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  16. Omnipure Q Series Replacement O-ring Large
    Omnipure Q Series Replacement O-ring Large

    Omnipure Q Series Replacement O-ring - Large

    Fits PuroTwist and many other brands

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    $2.99
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  17. Molykote-From DOw Corning- 111 Compound-6 Gram O-ring Silicone Lubricant & Sealant-Dow-111-5-gram-1000
    Dow Corning (Molykote) ® 111 6 gram O-ring Silicone Lubricant and Sealant - Be sure to lube your O-rings to help prevent leaks.
    Dow Corning/Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?

    Dow 111 Silicone MSDS Safety Sheet

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    $5.99 Special Price $3.99 As low as $1.79
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  18. Dow Corning/ Molykote 111 5 oz. O-Ring Silicone Sealant-1000
    Dow Corning - Molykote ® 111 5 oz. O-Ring Silicone Sealant - Be sure to lube your O-rings to help prevent leaks
    Dow Corning/MolyKote 111 ® 5.3 ounce Tube of O-Ring Silicone Sealant and Lubricant. FDA and NSF approved. Simply the best! (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Filter Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?
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    $24.99 Special Price $18.49 As low as $16.95
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  19. PENTEK- #151121- Slim-Line Water Filter Housing Replacement - 1000
    Pentek # 151121 O-Ring For Slim Line Water Filter Housing Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek # 151121 O-Ring For Slim Line Water Filter Housing Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. O-Ring For Slim Line Water Filter Housing. Buna-N FDA Grade. (Slim Line Housings Use A 3 1/2" diameter "O" Ring) Ametek # 151121 Same as Culligan OR-38 O-ring.
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    $5.69 Special Price $4.99 As low as $3.00
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  20. Pentek # 151120 O-Ring Replacement For Standard Size Water Filter Housings
    Pentek # 151120 O-Ring Replacement For Standard Size Water Filter Housings
    Pentek # 151120 O-Ring Replacement For Standard Size Water Filter Housings Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. O-Ring For Standard Size Water Filter Housing. Buna-N FDA Grade. (Standard Size Housings Use A 4" diameter O-Ring) Same as Culligan OR-34 O-ring.
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    $7.99 Special Price $4.99 As low as $2.79
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  21. Pentek # 151122 Replacement O-Ring For Big Blue Water Filter Housing - O ring
    Pentek # 151122 Replacement O-Ring For Big Blue Water Filter Housing - O-ring

    Pentek # 151122 Replacement O-Ring For Big Blue Water Filter Housing - Big Blue O-ring Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. O-Ring For Big Blue Water Filter Housing. Buna-N FDA Grade. (Big Blue Housings Use A 5 3/4" diameter "O" Ring) Ametek # 151122 Same as Culligan OR-100 for HD-950.

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    $13.99 Special Price $9.99 As low as $6.99
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  22. Pentek # 151254 O-Ring For Big Clear Water Filter Housing
    Pentek # 151254 O-Ring For Big Clear Water Filter Housing
    Pentek # 151254 O-Ring For Big Clear Water Filter Housing - Square Cut - Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. O-Ring For Big Clear Water Filter Housing. Buna-N FDA Grade. (Big Clear Housings Use A 5 3/4" diameter "O" Ring) Pentek # 151254. - Be sure to lube the o-ring with Dow 111 silicone sealant to help prevent leaks.
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    $17.99 Special Price $12.99 As low as $9.49
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  23. Culligan OR-233 Replacement Water Filter Housing O-ring
    Culligan OR-233 Replacement Water Filter Housing O-ring
    Culligan ® OR-233 O-ring # 411310 for Culligan US-600, US-640, SY-2000, SY-2300 and SY-2500, SY-2650 and Ace 4158622. 3" Diameter.
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    $7.99 Special Price $4.99 As low as $3.79
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  24. Hydrotech ® 34201026, Hydrofiner & Aquafier O-ring for water filter housing sump
    Hydrotech ® 34201026 & Aquafier O-ring for filter housing
    Hydrotech ® 34201026 & Aquafier O-ring for filter housing. Fits Hydrotech, Aquafier and Hydrofiner systems. 2 1/2" diameter
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    $8.99 Special Price $4.99 As low as $3.39
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  25. Microline / Clack ® S3069 water filter housing o-ring
    Microline / Clack ® S3069 o-ring
    Microline / Clack ® S3069 o-ring. Fits Microline - Clack sump #S7029. Replace O-rings when changing the filters to help prevent leaks. Be sure to replace the o-rings in all older systems. Be sure to use Dow 111 Silicone sealant to help prevent leaks.
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    $8.99 Special Price $5.99 As low as $3.99
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  26. Aqua-Pure-o-ring-bb-6889832 for 3M CUNO Water Filter Housings
    Aqua-Pure o-ring bb 6889832 for 3M Purification Water Filter Housings
    AquaPure Drinking Water Filter Housing O-ring #6889832 by 3M Purification. Keep your system from leaking and causing expensive damages by replacing your o-rings every other time you change your water filters. Be sure to order Dow 111 silicone sealant so the o-rings will seal properly. Never use petroleum based greases such as Vasoline. Use the best sealant, use Dow 111 silicone.
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    $8.99 Special Price $4.99 As low as $3.29
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  27. Culligan OR-34 O-ring Replacement for Water Filter Housings
    Culligan OR-34 O-ring Replacement for Water Filter Housings
    Culligan ® OR-34 replacement O-ring. Fits Culligan HF-150, HF-160, HF-360, and Ace 45025, 46764, 49560.
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    $7.99 Special Price $4.99 As low as $3.49
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  28. Culligan ® OR-38 Replacement O-ring for Water Filter Housings
    Culligan ® OR-38 Replacement O-ring for Water Filter Housings
    Culligan ® OR-38 replacement O-ring. Fits Culligan US-550, RVF-10, US Filter RO-2127, RO-3167, Ace 4158515.
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    $8.99 Special Price $5.99 As low as $4.39
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  29. Culligan ® OR-100 Big Blue O-ring # 151122 for Water Filter Housings
    Culligan OR-100 Big Blue O-ring for Water Filter Housings
    Culligan ® OR-100 replacement O-ring. Fits Culligan HD-950 Big Blue. Fits # 151122
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    $14.99 Special Price $9.99 As low as $7.99
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  30. Culligan OR-3 O-ring Kit With Three O-rings for Water Filter Housings
    Culligan OR-3 O-ring Kit With Three O-rings for Water Filter Housings

    Culligan ® OR-3 O-ring Kit With Three O-rings. Kit includes one OR-34, one OR-38 and one OR-223 O-rings. Often ordered by those who aren't quite sure which one is the right O-ring. # 151250

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    $14.99 Special Price $9.99 As low as $7.99
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  31. WFO-900 0-ring compatible with Culligan AquaCleer Good Water Machine Reverse Osmosis RO Systems
    WFO-900 0-ring compatible with Culligan AquaCleer Good Water Machine Reverse Osmosis RO Systems
    WFO-900 0-ring compatible with Culligan AquaCleer Good Water Machine Reverse Osmosis RO Systems. Fits AC Series and H Series RO Reverse Osmosis Aqua Cleer Good Water Machines. AC-15, AC-30, AC-5O, H5, H-53, H-8, H-82, H-83, H-84, etc. O-rings help prevent costly leaks. Be sure to use Dow 111 silicone sealant to lubricate the o-rings and provide the proper seal. Better safe than sorry.
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    $8.99 Special Price $5.99 As low as $4.49
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  32. OMNIFILTER K4 ® O-rings
    OMNIFILTER K4 Replacement Water Filter Housing O-rings - Set
    OMNIFILTER K4 ® O-rings - Price per set of 4. Fits Under Sink Models CBF1, OT32,CBF3, SFM2,CBF20, RO2000, OB3 And Whole House Models OB1, OB5, R12, R14. Be sure to order Dow 111 Silicone Sealant to Prevent Leaks. The OmniFilter K4 Replacement O-rings pack contains the following four o-rings: •1 Blue K4: fits OB3, SFM2 Series A, CBF1, CBF3 Series A, OT32 Series A, RO2000, R14, CBF20 and OB1. •1 Black WC9-13: fits white-head OB5 and OCT2. •1 Black OK40: fits OB1 Series A, OB5 Series A, R12 Series A and U25 Series E. •1 Black OK30: fits CBF1 Series A, CBF3 Series B, OT32 Series B, SFM2 Series B, RO2000 Series B
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    $13.99 Special Price $9.95 As low as $7.99
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  33. OMNIFILTER OK7 ® Replacement O-Ring for BF7 & BF7a
    OMNIFILTER OK7 ® Replacement O-Ring for BF7 & BF7a Heavy Duty Water Filter Housing
    OMNIFILTER OK7 ® Replacement O-Ring for BF7 & BF7a
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    $12.99 Special Price $7.99 As low as $5.99
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  34. OMNIFILTER OK25 ® Replacement O-Ring for U25 Series A and U26
    OMNIFILTER OK25 ® Replacement O-Ring for U25 Series A and U26 Water Filter Housings

    OMNIFILTER OK25 ® Replacement O-Ring for U25 Series A and U26 Water Filter Housings.   Be sure to order Dow 111 silicone sealant to help prevent leaks.

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    $8.99 Special Price $5.99 As low as $4.69
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  35. AMWAY- O-Ring Replacement for AM101, GEN IV, E84, E-85, E-0085 Water Filter Systems - 1000
    Amway * ® Compatible Fit O-ring Am101, E84, E-85, E-0085 (Does Not Fit E-9225 Drinking Water System)
    Amway * ® Compatible Fit O-ring Am101, E84, E-85 & Gen IV Water Treatment System. 5" outer diameter. 4 5/8 I.D x 5 O.D. x 3 /16 cross section or thickness. Remember to order Dow 111 o-ring silicone sealant to help prevent leaks. NSF and FDA approved EPDM O-ring.

    Be Sure To Order Dow 111 Silicone Sealant To Help Prevent Leaks!

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    $13.99 Special Price $9.99 As low as $6.99
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  36. GE MERLIN- O-Ring - #1240326 Replacement- 1000
    GE Merlin O-rings For Merlin RO Reverse Osmosis System Filter Housings
    GE Merlin O-rings For Merlin RO Reverse Osmosis System Filter Housings
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    $9.69 Special Price $6.99 As low as $4.99
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  37. WFO O-ring - Sears Kenmore UltraFilter ®, Whirlpool ®, EcoWater ® , Ecodyne ® compatible water filter replacement o-ring
    WFO-O-ring - Sears Kenmore UltraFilter ®, Whirlpool ®, EcoWater ® , Ecodyne ® compatible o-ring
    WFO-O-ring - Sears Kenmore UltraFilter ®, Whirlpool ®, EcoWater ® , Ecodyne ® compatible o-ring. Fits Sears Kenmore UltraFilter ® 150, 625.385700, 42-38476 Sears Kenmore UltraFilter ® 300, 625.384720, 42-38476 Sears Kenmore UltraFilter ® 350, 625.385720, 42-38476 Sears Kenmore UltraFilter ® 500, 625.384750, 42-38476 Sears Kenmore UltraFilter ® 550, 625.385750, 42-38576 Sears Kenmore ® 42-38456 Single Stage Deluxe Whirlpool ® WHER 12 Reverse Osmosis System Whirlpool ® WHER 18 Reverse Osmosis System, EcoWater ® 350 & 450. #E1000-228 --- 2 1/2" Diameter. Be sure to order Dow 111 Silicone Sealant to help prevent leaks.
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    $8.99 Special Price $5.99 As low as $3.99
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  38. O-rings For Standard Style RO Reverse Osmosis Membrane Housing
    O-rings For Standard Style RO Membrane Housing
    O-rings For Standard Style RO Membrane Housing. Pair of O-rings for standard style reverse osmosis membrane housings.
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    $17.99 Special Price $9.99 As low as $8.49
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Be sure to check our Parts Departmentfor important parts such as TDS Testers, Replacement Tanks, O-rings,Housing Wrenches and more parts for your reverse osmosis pure water system.

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