Well, today I ran into the first sharkbite failure I have personally run into. The nextdoor neighbour had a new dishwasher installed last summer and the installer cut into the hot water line BELOW the shutodd and inserted a sharkbite "T" to connect the washer. The copper pipe was over 40 years old and there was some verdi-gris on the copper. He did not clean the copper with steel wool or sandbaper befor installing the sharkbite..
Today the neighbor needed to replace the "O"rings in the kitchen faucet so went to turn off the shutoffs under the sink and all of a sudden he had water dripping from the top of the "T". He called me over and I shut off the hot water with the shutoff on the feed to the water heater. The shutoff leaked so I turned the water back on just part way, where the packing didn't leak.Went up to the kitchen and the water was RUNNING out of the sharkbite.
I ran over to Home Despot and grabbed new shutoffs and a handfull of fittings and replaced the whole shebang - putting the shutoff BEFORE the "T" and dishwasher as well as the faucet.and soldering everything. Under an hour including the run to the "borg"
Now I'll have to replace the shutoff at the water heater some day - hopefully the main shutoff will work - - - - - - - And it's buried behind the washer/drier.