Originally Posted by Camping Couple
If you want brass fittings without the metal clamps, Home Depot carries "shark bite" fittings that work with PEX tubing. Push the tubing into the fitting and it locks in place. I had to replace a bypass valve in the fall for the water heater. Worked great!
Shark bite fitting $2.29
Plastic replacement valve $.89
I'll stick to the shark bite valve for piece of mind.
Sharkbites work well provided you are careful to get the tubing fully seated in the fitting. A lot of folks stop at the first "click" and end up blowing the tubing out of the fitting. Additionally, some Sharkbites can get pretty costly. Sharkbite is a brand name and there are many others that work on the same principle. They do have a neoprene "O" ring seal on the inside that can be damaged during installation. I don't know if the "O" rings can deteriorate over time.
I don't think anything beats a good crimp ring on a metal fitting if you have the proper tools.