I bought 4 of these and 3 of them have expired. I wasn't able to seal two of them without breaking one of the hubs. The third simply broke and after a month of operation began to leak when water with a temperature not exceeding 80 degrees flowed through it. The fourth is currently sealed, but I'll keep a close eye on leaks in the future. To sum it up, save your money and look elsewhere for something with metal hubs that can handle tightening the appropriate metal fitting. I've added a photo of one of them licking out the hub. This is part of the factory seal and does not need to be checked.
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