broken pipe in slab flooring
either try it or google it
Go with the union compression I know their more expensive
Depends on local codes. But Sharkbite fittings are certified for underground use so putting them in the floor should be alright. Good luck!
Why would you even consider sharkbites or any other repair leading you back to the place of the failure i.e. the slab floor? Were you able to diagnose why the waterline failed? Poor solder joint by the installers, movement in the slab floor cased by shifting due to wet and dry conditions? Terminate that run and go overhead with pex tubing and eliminate the possibility of it happening again. I’ve had to do to runs that way already if one more run fails I’ll go overhead for the whole house and be finished with any further problems.