Originally Posted by
Papa Bear
. So if you have a 119qft steel tank rated at 3500psi and you get a fill that cools to 3000psa you have apx 100qft of usable air. The best is a steel 95 to 105qft Low pressure tank. Rated to hold 95qft at 2400psi. Now most boats and shops will fill it hot to 3000psi plus or minus and you have 20% over fill or 95qft will have close to 118qft of air compared to the HP 119qft that only has Apx. 100qft! So to me a LP steel is the way to go! So as you should have covered in your basic class the letters and numbers on the tank do matter. After you have been diving awhile as a woman you will blow the doors off most male divers as far as consumption!