It turns out the fittings are manufactured by "Waterline" out of Missisauga, Ontario, Canada.
I think they are garbage. I have had two fail, it looks to me that the metal is not of good quality. They are snapping off and look all crystalized at the breaks.
Their warranty states that they will not be responsible for property damage, or labor, just the item itself.
These failures were in the wall and ceiling of a 4 month old house, and have caused a thousand dollars(rough estimate) damage. I should have stuck to my original notion of running copper throughout, although I do have more faith in the Wirsbo products, I used those on my heating system.