These two recommendations corrected the leak. Thank you for sharing.

"Slight differences in manufacturing tolerances" due to a change in manufacturing facilities result in a mismatch between old heads and new cartridges--and "sometimes the older heads do leak with the newer cartridges." Of course, it is just as easy and truthful to say: "sometimes the newer cartridges do leak with the older heads." Please clarify: have the cartridge manufacturing tolerances changed, or have the design specifications changed on both the head and cartridge? A change in tolerance does not guarantee a leak-free fit with a new head, especially if the tolerances have been relaxed. The mention of "sometimes" is disconcerting, and leads me to think tolerance design specifications have changed--thus making the older head and cartridge obsolete. Of course, if specifications have changed along with relaxed tolerances, then there is an increased possibility for leakage on new product, too. And the reason Everpure would make this change, or these changes. . . ? Obvious answer: to reduce manufacturing costs and require customers to replace their older, perfectly functional system with a 'possibly' lower quality new product. More obvious answer: greed.

I change hundreds of these a month. There's only two orings holding it back from leaking and is not 100% leak proof. Not all evepure filters are made equal. Especially the 4Cs. Sometimes, it is just a bad batch of filters, and even with a new heads, or changing the o rings they still leaks.

Thanks! Well done!

Simple and Helpful!!

I replaced my filter. I've done this many times. This time I see water leaking near the lever. Is the cartridge bad?

The first time I changed it was so simple, I'm having a hard time getting the filter off this time, it won't turn. Any suggestions?

Do you need teflon tape for both adapter fittings when installing?