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Your cart is empty.Product Description
Captain O-Ring's replacement 151122 o-rings are compatible with the following filter housings:
- Aqua-Flo H-PR-10BV-1
- APEC HBB-20/HBB-10 series (input sizes: 3/4", 1", 1.5"), HBC-20/HBC-10 series (input sizes: 3/4", 1", 1.5")
- Ace Hardware 49561
- Ametek Kleen-Plus HD-10-R50, BBS
- American Plumber W10-PR, 152014, W2010-PR, 152015, W15-PR, 152016, W2015-PR, 152017, WWHC, 152022
- AO Smith AO-WH-PRL
- Culligan HD-950, HD-950A; Omnifilter BF7
- Pentek/Pentair Big Blue Heavy Duty Series (150469, 150470, 150467, 150468, 158799, 150237, 150238, 150233, 150234, 150239, 150240, 150235, 150236, 150671, 150426, 150383, 150672, 150639), Big Blue with Drain (150689, 150690), PBH Series Bag Filter Housings (150360, 150367, 150338, 150337), #10 and #20 (4.5x10” and 4.5x20”) Big Blue (142928 REV B NV13, 150233, 150234, 150235, 150236, 150237, 150238, 150239, 150240, 150383, 150426, 150467, 150468, 150469, 150470, 150639, 150671, 150672, 150686, 150687, 150688, 150689, 150690, 150691, 158799, BBFS-22, BBFS-222)
Exact OEM size for a perfect fit in your compatible water filter housing
The exact OEM size match allows Captain O-Ring’s 151122 o-rings to drop right into your compatible housing with the perfect fit. They won’t pinch or move during installation and won’t bind up during removal when it comes time for your next filter change.
Captain O-Ring’s 151122 o-rings are packed flat in their package, rather than curled up like other brands. This allows the o-ring to easily fit into your housing right out of the package. No more wrestling with the o-ring to keep it flat in your filter housing during install.
Frequently Asked Water Filter O-Ring Questions
How often do I need to change my filter housing's o-ring?
Captain O-Ring's 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 don't 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.
What if I need a thicker o-ring for a filter housing that isn't listed as compatible with the 151122 o-ring?
If your "Big Blue" filter's o-ring is 5.5" in inside diameter, but thicker than 0.165" (closer to 0.210"), then you most likely need the Culligan OR-250 o-ring (found here: amazon.com/dp/B074THDBQ2). If you're not certain about the o-ring size, use our printable water filter o-ring size chart to print out and size up your old o-ring to the page to confirm the part number needed (see product photos for details) or feel free to contact Captain O-Ring and we'd be happy to help determine the part number you need!
DAM7
September 2, 2025
I seldom write a review however this one was easy to do. I normally reuse the o rings when changing out a filter in the big blue housing every 6 months. Last time I noticed the o ring was starting to get stretched out and didn’t fit perfectly I went ahead and installed it nonetheless hopefully it wouldn’t leak and it didn’t. Recently when it came time to change the filter again I ordered these new o rings hoping for a good fit. I was pleasantly surprised these o rings fit perfectly in the housing and made the reinstall very easy and confident it wouldn’t leak. I was too cheap to buy new o rings previously however they cost was worth it with an easier replacement and removed the concern of a leak.
John
August 23, 2025
A family member uses well water, and we use a Cascadian branded large filter system to remove the fine silt and minerals. They fit PERFECTLY in the filter cover (or housing) and have NEVER had a leak using these.
Richard Tucker
July 26, 2025
Makes the installation of the filter a snap. Good product!
Foghat Leglamp
July 20, 2025
There are a few reviews claiming the O-ring is too large for "big blue" type filter housings. Not so. Just like with the OEM rings, it takes a little work to get the ring fit into the channel in the housing. Install it right and it works.First, make sure the channel is clean. If the old O-ring isn't in it, and it didn't fall out on the floor when you removed the bottom of the big blue housing, it's still stuck in the top. Fish it out before you try to put the housing back together. Next, grease the new O-ring with petroleum jelly. No, not whatever exotic vegan sex lube the kids are using these days - plain old Vaseline. Push it into the channel in the housing. There will be a little "slack" to be pushed in. Work around the housing from 12 o-clock to 6 on both sides. The grease helps. No, that does not mean the O-ring doesn't fit properly. Once you have it seated, install new filter and screw back on. Don't forget to use the air purge when you slowly refill the housing.
Charles M.
June 20, 2025
Works as intended for seal of water filter
Christopher
June 1, 2025
It was the correct sized o-ring.
scott
May 24, 2025
On time, quality products!
Kindle Customer
March 26, 2025
Fits perfectly and costs much less than getting it at a culligan dealer.
ESalgadoMtz
March 8, 2025
Muy buen producto, hecho con buenos materiales y también buenos terminados
Jake
March 7, 2025
This o ring worked well for replacing our old o ring on the big blue whole home water cylinder. Good fit. No leaking.
KarlR
February 8, 2025
Just changed all my water filters the other day. The ones I have are originally Home Depots Glacier Bay 4.5x10 inch filter system. The old rings were stretched and not up to the job any more. These fit perfectly. Will also fit the new EcoPure filter system that has replaced the Glacier Bay house brand in Canada.
SS
December 29, 2024
Purchased this item along with food grade silicone grease. Applied grease to o-ring and placed o-ring into Pentair 20" water filter housing. Hand tightened the housing, then did an additional 1/8 turn with plastic housing wrench. No leaks, product worked well.
Thien Le
December 22, 2024
Finally I can replace my old one and it fits very well.
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