Your cart is empty.
Your cart is empty.Product Description
Water Filter Housing Compatibility
Captain O-Ring's replacement 63597174C / WP252235 / AO-WH-STD-OR-2 o-rings are compatible with the following filter housings:
- 3M (AquaPure): AP11S, AP11T, AP12S, AP12T, AP26T, AP51T, AP101S, AP101T, AP102S, AP102T, AP110, FHO-34, FHT-34
- 3M AP200/210 Series, APC77, APC78, APCRF (Replaces square ring 36851-35)
- AO Smith AO-WH-PRE, AO-WH-PREV, AO-MF-B
- Project Source PS-WHS-H, PS-WHS-HV
- Watts: 500222, 500223
Note: This image shows where the o-ring is typically positioned, between the filter housing and the filter head.
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.
Chuck
Reviewed in the United States on February 4, 2025
These new o rings fixed my leaky filter case. They don’t look much thicker, but they sealed fine for me.
stephen winter
Reviewed in the United States on January 6, 2025
purchased these for my water filter Works great!!
Gordon Booth
Reviewed in the United States on January 10, 2025
works as intended
Robert
Reviewed in the United States on October 19, 2024
Friendly and safe
Customer
Reviewed in the United States on January 21, 2024
Exact replacement for my A.O. smith water filter.
horace
Reviewed in the United States on January 16, 2024
these fit my Watts clear housing water filter. I lube the O-ring and threads of the housing with silicone grease and so far so good.
My2Cents
Reviewed in the United States on August 11, 2022
The good news is that I could still use the product, but it does not fit my Watts 500222 water filter canister. I had to cut the ring with a sharp utility knife and the lay it in the groove of the canister. I could then see that it was about an 1/8th of an inch too long. I cut it to fit and taped the ends together with very little black, down spout tape. Only once around as to not make a bulge in the ring. Installed it and hand tightened it. Works great.
W. A. Smart
Reviewed in the United States on January 7, 2021
Nice to finally have a company that provides the exact size needed for the Watts filter. While changing the filter cartridge (monthly), I popped out the old gasket/o-ring (rather brittle after so much use), I inserted the new, supple--exact fit--0-ring. It provided such a good seal that I did not need to tighten the outer case nearly as much as before. Great product and fast delivery.
Recommended Products
$16.99
$ 8 .99 $8.99