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 - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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