5 out of 5
Customer Reviews
By
M. Anderson
Date: February 27, 2023
They were delivered as stated. Buying here is cheaper than at a water softener store.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By
Boris Milman
Date: February 21, 2023
I have a Pentair Big Blue filter housing, and on the third filter change it developed a very slow leak. No amount of tightening or regreasing would solve it, then when I measured the O-ring, I found that it had flattened slightly.I ordered this 3-pack from Captain O-Ring, coated one lightly with silicone plumbers grease, and it has sealed perfectly. Highly recommended, and a great value for three.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Richard Keller
Date: February 17, 2023
I put in a different brand of O-ring about 3 years ago. It slowly leaked and never really sealed even after cranking down on the filter housing. This ring was thinner and I was afraid it wouldn't be thick enough to seal properly. I was wrong. A week later and no leak. I did use some silicone grease/lube on each o-ring.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Richard Keller
Date: January 20, 2023
good
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
StopherB
Date: January 20, 2023
good
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
sandwichtyme
Date: December 07, 2022
These fit perfectly with my Pentek Big Blue whole house filter housing (matches due to these being 5.5 inner diameter). used some plumber's silicone grease as well on them. Thank you.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
A Customer
Date: November 30, 2022
These worked good.They fit good.Not much else to say
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
LLAP
Date: November 20, 2022
This o ring worked perfectly with my big blue filter.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Ame
Date: November 05, 2022
I order these o-rings whenever we change our filters on our blue Pentek tanks. They are easy to install, and work fine.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Christopher A. Butera
Date: October 17, 2022
I needed to order replacement o-rings for my big blue 20 inch water filter. This was the first time I didn't order OEM from Pentek. However upon installation these proved just as good for a better price. I have zero issues of leaks.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
lewis steele
Date: September 16, 2022
Nice to have a couple extra on hand
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Carrie
Date: September 12, 2022
Good product and no issue installing them. Great value for t he price.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Anne
Date: September 11, 2022
Worked as described. Make sure you order 2 packs. You get 3 per pack but you need 4 as the filters use 2 o-rings each.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Zoso
Date: August 24, 2022
Just ordered another set of Captain O-Rings, they fit perfectly and seal properly.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
AGS
Date: July 24, 2022
Due to my lack of knowledge or experience, I used the original ring on my system for 6 years. It was a challenge to prevent it from leaking after filter changes in the last couple years. I just installed this replacement ring and it fit and worked perfectly. No drips on the first try. The height of this ring is about double of the one I tossed, which was a good sign. Great product!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Ron Kokofsky
Date: July 23, 2022
Worth the money
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
James
Date: July 06, 2022
Great replacement o-ring for express water while house water filter!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
Ersin SAYDAM
Date: July 02, 2022
Thank you
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
A Customer
Date: June 07, 2022
exact replacement and fit for my ofilter housing
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By
James DeBurro
Date: May 24, 2022
these o-rings are changed yearly on the filter housings our printing press chillers
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]