This is one of the 1st Phoenix regulators sold in 06 and has been doing a hell of a lot of diving since then. I really like to see regulators that I put together after they have a lot of dives on them. Goes to show how tough the original double hoses are. The only reason this one is with me is because it was starting to free flow a little....Use like this would have KO'd most other regulators within the 1st year let alone 4 yrs!