I recently purchased a few 40" regulator hoses from TDL, but they are really stiff and actually fatique my jaw while doing short decos. Hose description: These hoses are very thick and the outer casing has a plastic looking, shiny appearence. I have seen hoses that are smaller in diameter and have a rubberized outer casing that appear to be much more pliable. Does anyone know where I can get these hoses in all sizes? Much appreciate.
Note: The information I am giving here is based on my personal observations with regard to hoses found on scuba equipment. It certainly is not definitive, as I am sure I have not seen it all.
With the exception of BC inflator hoses, almost any regulator low pressure hoses, manufactured in the United States, will be made from Gates or Goodyear hose stock. For the 250 PSI service pressure and the 400 PSI service pressure hoses, the outside diameter will be somewhere between 0.562 and 0.580 inch. The inside diameter will be 0.3125. Given that the braided (pressure bearing) part of the hose is fairly consistent in thickness, this yields a rather thick rubber protective coating. When you see comparable hoses from the Asian market, the outside diameter of the hose will be somewhere between 0.390 to 0.420 inches. Most of the ones I have seen from the Asian market are in fact very pliable....not because they are higher quality, but quite the opposite. They have a much thinner protective rubber shield, resulting in a "lower" quality hose with regard to durability.
Hose stock that is made in the United States will state plainly on the hose "Made in USA". If the hose is assembled in the United States, it will say "LOW PRESSURE TESTED". The law requires these markings for products MADE in the United States. They, obviously, are not required from foreign manufactured hoses.
I have seen the hoses with the shiny outer coating. If I recollect, they are made in the United States, but I don't know by whom.
Sometimes, when a hose is not as pliable as another, that is a measure of high quality, not the opposite. That does not change the fact that a smaller diameter hose might feel better. Anyway, just my added comments.
Phil Ellis