Tha main reason to have a tank boot is to protect the paint and anodising of the cylinder. Dragging and standing the tanks on the non protected base will soon remove the protective coating. Thats fine if you cave dive and the corrosion also gets scraped of being dragged through a cave or dive regularly enough to rub it off.
Corrosion under the boot normally takes acouple of years to penetrate a good coating. Its takes days to get under an existing scratch in it
Also if you dive aluminium tanks then a 2mm score is a test failure (it is in the UK), as Aluminium is so soft thats easy to do without a boot.
I tend to put boots on my back tanks as its handy to stand them on things to put them on. My stage tanks do not have boots
Boots are removed and fresh water flushed after each dive (or better yet, I take em in the pool). I have tanks up to 48 years old (Siebe Gorman 40 cuft 120 bar), most are 15 years old. All easily passed inspection this year (Hydraulic and visual)
Corrosion under the boot normally takes acouple of years to penetrate a good coating. Its takes days to get under an existing scratch in it
Also if you dive aluminium tanks then a 2mm score is a test failure (it is in the UK), as Aluminium is so soft thats easy to do without a boot.
I tend to put boots on my back tanks as its handy to stand them on things to put them on. My stage tanks do not have boots
Boots are removed and fresh water flushed after each dive (or better yet, I take em in the pool). I have tanks up to 48 years old (Siebe Gorman 40 cuft 120 bar), most are 15 years old. All easily passed inspection this year (Hydraulic and visual)