I have a ten year old home full of it and have suffered a leak just about every year. The leak itself is cheap, it’s all the water damage that follows that sucks. You can Google "Zurn class action" and read all about it.
My research shows that the problem lies in the crimp type fittings. To keep the flow going the inserts are very thin. When you crimp the band it tends to micro fracture the sleeve next to the body of the fitting. At some point it fails. If I recall right Zurn made the majority of the brass crimp fittings in question. Oh and they still make them. I think they changed the type of brass but they still make crimp fittings.
I have since heard that if you use the non crimp fittings you will not have issues. I think shark bite is of this type.
Only other thing I dug up on it was a manufacture's process that failed to seal / create the tube properly. This was limited to that manufacture and resolved pretty quick.
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Today's Featured Article - Ford Part Number Trivia - by Forum Participants. "Replaced by" means the part was superseded. All of my part books date back to 1964 and New Holland have changed some part numbers. They usually put the old Ford part number on the package. I was suppressed when I looked up the part number of the auxiliary drive shaft because for some reason the part number went through a radical change and it lost its "Basic Part Number". Ford part numbers follow the following rules. Most part numbers are in three parts. The middle part is called the
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