Pentek, Pentair Water 151122 Big Blue O-Ring Buna-N ORing

• Package Quantity: (1) Piece
• Type: O-Ring
• For Use With: Pentek, Pentair Water - Big Blue Housings Only
• Material: Buna-N

This product is as advertised. A large O-Ring that fits many of the large water filter housings. Seems to work fine.

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Almost every time I change the cartridge of my Big Blue, its O-ring swells like a chubby kid after X''mas buffet and doesn''t fit into his pants any more! Why can''t they design an integrated O-ring that lasts longer and stays put? Such a flawed design of the whole Pentek Big Blue system! AARGH!

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The O-rings do stretch a bit and flatten too if you tighten them too much. But, that happens with all O-rings and it is just more apparent with a BIG ring. Here''s the tip for a long and multiple use life do NOT overtighten the housing, if the 0-Ring is a bit too large, put it into the freezer for about 10 minutes and then install it it will shrink enough to install properly.

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This is a piece of junk. After you change your filter a few times this ring expands and doesn''t fit into the slot. Plan on buying two cuz you will need the other for when the first one fails to fit properly. Then you should plan on buying two more.

Recieved fast. Works great. Had the product that I needed at a fair price. Not much more to say about an O Ring.