They say then argue when I tell them they do. Im probably just imagining things though.

I thought it was shark bites don't leak , till they do.

and they don't for everyone and not leaking for 5 years is not the same as not leaking , it seems really similar for 5 years and then it isn't.

To be fair that like gets 180° water rna throu it all winter and they leak when I shut it down and they cool off.

Those two are the only shark bites fitting left i have not replaced with better fittings. I have been lazy with these . 1 i dont have a crippling tool for one inch lines and it looses a lot of water fast. So typically its faster and easier to snap another fitting on it and lie to myself I will fix it right later. Then it out of sight an mind tell the next spring.

Im lucky. Replumbed half the basement over 10 years ago with all kinds of shark fittings and have never had a leak. Hot and cold water. Didn't know anyone had problems with them.

But your hot water doesn't get to 180 degrees or higher pf is running a outside wood burner heating his domestic hot water during winter months and I know for a fact that water gets hotter then 180 that's normally when the fan or solenoid shuts off so that water temp will get alot hotter then 180. Iam not sure what shark bites are rated for.

Replace with Pex

Pretty sure that IS PEX.........

Looks like PEX. I would check to be certain the pipe is pushed all the way in, fully seated in the fitting.
I have used a lot of Shark Bite fittings over the years, and knock on wood, zero leaks, that I am aware of.
I don't use them anymore. I use PEX or similar for tubing and crimp insert fittings now. Quality crimpers have come down in price dramatically, and the fittings and crimp rings are cheap.

Thanks for clarifying. I just looked up general ratings for them. It said 200°F and 200-250psi.

Most any fitting has potential to leak,

They are absolute garbage. I hate them and have banned my employees from using them. We’ve seen way too many problems caused by them.

I had sharkbite hoses fail internally on a water heater on the hot side. I blame it more on what they put in our city water around here. I had black stuff show up in sinks and the bathtub that was very difficult to clean up. Our water ate all of the faucet and sink cutoff valve washers all through the house.
Had to chamge them all to washerless fixtures.

Drink up!

PEX failed on my water heater and flooded my basement in my old house.

Was told by a plumber that they would eventually fail

Friend, not one trying to upsell me

Looks like copper to PVC fitting to me

I'd have to see how square the cut on the tubing was, how burred / clean it was, and how well it was inserted into the fitting before I blamed the shark bite fitting. They are usually pretty solid FYI. Not all 'Shark Bite' fittings are "Shark Bite Brand". They are more expensive and worth it but sometimes stuff just happens.

Often shark bites are not properly installed or the wrong one.
alaska viking Is a prime example, shakes bites need to be pulled after inserting and twist.