Captain O-RingCulligan Compatible OR-250 (OR250) Replacement Filter Housing O-Ring Buna-N ORing (3 Pack) (Compatible with WH-HD200-C, 3M 3WH-HD-S01, Dupont WFAO100, 3M AP801B/T, AP802B/T, etc)

Arrived quickly, perfect fit

Contacted company because my water filter MNF wasn't listed. Gave a prompt response to the ? of O ring size. Ordered part which even with exchange was significantly cheaper than Amazon.ca Part arrived quicklyParts was not installed but compared to original and appears to be well made.

Bought these as spares for my Aqua-pure 802B water filter. They look like the right size. I haven't had to use any but during the last filter change I checked that they would fit.

To my knowledge, which is somewhat limited in this area, these rings are all just a fraction larger than what would work perfectly. However, with some careful placement and a couple of attempts, it will settle in and form a good seal.

Good quality

These worked perfect for sealing the canisters on a CR Spotless system. Original manufacturer price was ridiculous for just one seal. Here I was able to get 3 of them. No leaks now!

I recently had a whole house filter installed out at my well house, it came with a spare 0 ring but I could not find a matching size at my local plumber shop so I order these. They are just slightly bigger than the one I had on hand but I just changed out my filter and these fit perfect with no leaks. I now have some spares on hand for future swaps and now know where I can find more as needed.....

I have a Big Blue or equivalent 20” whole-home water filtration system that takes a 20” Pentek filter. The gasket recommended for that model elsewhere here on Amazon is too thin for mine, but this one matches the OE and fits perfectly.

Basically got 3 of these for the price of 1 original Culligan. They look to be the same but won't know for a few months until I change the filter.