At EcoInnovation Technologies, we try and test our product before releasing it to the public. The new CopperLoc fittings were literally destroyed in situ to see what sort of stress would cause them to leak. It has proven to be extremely difficult and challenging to get a leak. Unlike its competitor, the sharkbite fitting, the CopperLoc fitting is more robust and forgiving. Rest assured, we have done some pretty crazy stuff with these fittings and they have not failed us once.