Sharkbites == never again for me.

I've had two pipes in our house fail due to rapid temperature variations. Both were (insulated) copper hot water pipes in an exterior wall. In both cases the sharkbite fitting blew out it's sealing ring within a year of being installed and caused thousands of dollars worth of damage. Neither was connected to an exterior tap.

We have relatively high pipe pressure in these parts but well within the range of the fittings. They simply don't work, I wouldn't trust any sharkbite fitting in-wall, and won't ever risk it again.

Insurance won't pay for anything but cleanup. Sharkbite won't pay for their, used as instructed, failures. And the siding contractor who hit the original lines and fixed them with sharkbites is not willing to pay for sharkbite's failure to function as advertised and instructed.