






💧 Seal the deal with leak-proof confidence!
This APEC Replacement O-Ring Set includes three 3.5-inch diameter O-rings specifically designed for APEC ESSENCE and ULTIMATE reverse osmosis systems manufactured before mid-2015. Made from NSF-compliant materials, these lightweight O-rings ensure a secure, leak-proof seal for your under-sink RO filter housings. Easy to install and essential for maintaining optimal water filtration performance, this genuine APEC product helps you avoid costly leaks and system downtime.












| ASIN | B01IDVIG30 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #26,486 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #9 in Undersink Water Filtration Replacement Parts |
| Brand | APEC WATER |
| Color | black |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,490) |
| Cutting Diameter | 3.5 Inches |
| Date First Available | July 13, 2016 |
| Global Trade Identification Number | 00854961005969 |
| Included Components | O-RING-SET |
| Is Discontinued By Manufacturer | No |
| Item Diameter | 3.5 Inches |
| Item Package Quantity | 1 |
| Item Weight | 0.493 ounces |
| Item model number | O-RING-SET |
| Manufacturer | APEC WATER SYSTEMS |
| Material | NSF-compliant |
| Nominal Inside Diameter | 3.25 Inches |
| Nominal Outside Diameter | 3.5 Inches |
| Number of Pieces | 3 |
| Part Number | O-RING-SET |
| Pattern | Version A |
| Set Name | O-RING-SET |
| Size | 3 Count (Pack of 1) |
| Temperature Range | 60 to 100 Degrees Fahrenheit |
| UPC | 854961005969 |
| Unit Count | 1.0 Count |
M**L
Fitsapic type A housing
These Rings fit Apex type A housing but $5 for the little squeeze of Grease is a joke you can buy the O-rings themselves for $7 but definitely use Grease
A**R
It is larger, but solves the leaking problem
It's hard to sit the ring in the socket - this is obviously larger than the original ones. But once installed it fixed the leak.
W**R
Works Well!
This was a perfect fit for my water system. Just make sure to carefully look at the photo description as this company makes two sizes! it's very easy to accidentally choose the wrong one if you are not paying attention. All you have to do is match the filter housing to the photo and you will know if it will fit or not. I applied some food-grade silicone to the O-ring to give it a better seal. You can also put some of that silicone on the rubber gaskets on both sides of the carbon filters (stages 2-3). This helps it seal much better. I noticed that if I did not apply the silicone to the carbon filters there is usually a buildup of gunk (??) on the top seal which tells me the seal may not have been performing as it should. I love the APEC Roes-50 water system! It has made a huge difference in our water quality (and we sure don't miss having to carry all of those heavy 5-gallon water bottles from the store)!
F**S
Good idea
Must have if your going. To replace those filters. Cheap
K**I
Little bit on the large side but no leaks.
Figured I would change the o-rings with the filters to lessen the chance of any leaks. These o-rings are the APEC brand and not aftermarket. I put a little bit of plumbers silicone grease on them prior to installing. O-rings were a little bit oversized which I thought was odd. I installed them best as possible and no leaks. Due to size versus what was in there from new I gave 4 stars instead of 5. So far so good, no leaks. I have the ROES-50 system on my kitchen sink, great low cost system that removes all weird taste from my municipal supplied water. Glad I have this system. Update: 12/2/20 - product page has changed and now there is a set B available. Per the ordering instructions my filter canister housings matched their callout for set B. Upon installation the B O-Rings were undersized and not laying flat in the housing channels. I reinstalled the set A from the last service, thankfully no leaks. Not sure what the problem is with getting O-Rings that seat correctly. Amazon made right as usual and refunded the purchase price. I made notes and will order set A next go around and see what happens.
O**D
Seal of Assurance: APEC Water Systems O-Ring Set for Leak-Free Filtration
I tried the APEC Water Systems SET 3 Pcs 3.5" O.D. Replacement O-Ring, and it's a lifesaver. The three-piece set ensures a snug fit for reverse osmosis water filter housings. The black O-rings are durable and efficient, sealing tight to prevent leaks. If you're maintaining a water filtration system, this replacement set is a reliable choice.
P**S
Add with filter change out
Used in conjunction with point of use water filtering kits. Helps prevent leaking filter housings. Fits apec reverse osmosis pre filter housings.
H**R
Gaskets
Good idea to change gaskets when changing the filters to keep any leaks from forming preventative maintenance
H**M
المنتج صينى و الوصف اونطه مش امريكى و كاليفورنيا بس شغال لولا انى محتاجه كنت رجعته علشان يتعلم التاجر الصدق فى الوصف و طبعا السعر غالى بما انه صينى مش امريكى و محطوط فى كيس غريب
P**P
Original replacement parts.
H**X
One of our RO tubes was leaking and we had to replace the o rings. It took a while to find the right size but when we did it worked perfectly. No more leaking.
A**R
بس في أفضل من كدة
B**G
A little larger than the original, it’s ok for installation and no leak
Trustpilot
4 days ago
2 weeks ago