can this ring be streching?

Do you mean can it be stretched? Essentially, no. A little bit, but O-rings are not elastic like rubber bands.

Anyone tried these on us water systems magna (grey housing) filters?

It's plumbing. There's no way to know whether a gasket or part will fit without buying it and trying it.

is this the o ring for an Aqua Flow 26258?

The filter housing for this ring is for a 20" Big Blue filter which was installed by Culligan......my guess is the diameter is a standard size for any 20" housing.....but best to confirm with Aqua Flow

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💧 Seal your water system like a pro—never compromise on purity or performance!

CONVENIENT 3 PACK - Comes in a branded, resealable zip bag—ready to replace or stock up without hassle.
PRECISION OEM FIT - Engineered to perfectly seal Pentek large blue filter housings, ensuring leak-free performance every time.
LEAK PROOF CONFIDENCE - Choose between standard and thicker profiles to eliminate cap seal leaks when fully tightened.
VERSATILE APPLICATION - Ideal for drinking water purification, swimming pools, and industrial filtration systems—your all-in-one sealing solution.
PREMIUM NITRILE RUBBER - Crafted from flexible, wear-resistant Beech N material for long-lasting durability under water pressure.

Captain O-Ring’s Pentek 151122 O-Rings are precision-engineered, 5.75-inch diameter synthetic rubber seals designed for Pentek large blue water filter housings. Made from durable nitrile butadiene rubber, these OEM-standard rings come in a convenient 3-pack with resealable packaging, offering reliable leak protection for drinking water, pools, and industrial filtration applications.

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Color	Black
Size	Standard OEM Size
Manufacturer	Captain O-Ring LLC
Material	Synthetic Rubber
Item Weight	18 g
Package Dimensions	16.3 x 14.6 x 0.9 cm; 18.14 g
Package Weight	0.02 Kilograms
Batteries Required	No
Batteries Included	No

Captain O-Ring Pentek Pentair 水用大型OリングブルーブナN 3パック 151122 Standard OEM Size ブラック 151122x3

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Captain O-Ring Pentek Pentair 水用 大型Oリング ブルー ブナN 3パック 151122 Standard OEM Size ブラック 151122x3

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions

Captain O-Ring Pentek Pentair 水用大型OリングブルーブナN 3パック 151122 Standard OEM Size ブラック 151122x3