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I've got both HP and LP tanks and the LP's win hands down. Mainly becase they are more negative so you don't need much of a v-weight (if at all). As as far as filling is conserned if you (or your dive shop) has to time to fill/cool/fill/cool/fill you can get a good fill. While with LP you walk in and fill to 3000 and they cool off to 2600 in one swoop. On a dive boat with a compressor you can forget it, you might as well treat HP 100's as 80's and 120's as 100's. HP tanks for some reason rust very easyly and I recommend breaking down your doubles 2 or 3 times a year to inspect/roll/whip to avoid loosing a tank. Jim On 8/20/98 9:44 AM TND2@ao*.co* wrote: > Personally i dive double hp120's,they give me plenty of air at their rated >pressure(3500),they are quite a bit lighter above the water(38# a tank >compared to an oms 125 that is 45#),and they are more bouant,which helps when >diving wet,and the typical wreck setup of reels,hammers,etc.(i.e ditchable >weight) > Lp's get their volume from a larger tank with lower pressure,that explains >them being heavier on land and less bouant in the water,it has been said the >its easier to get a good fill in a lp due to its lower operating pressure,but >ive never had a problem with getting 3500 psi,another point ive seen has been >the safety of the lower pressure on the regs at rated pressure,there might be >a good point there but ive never seen a problem with my regs,or friends >either. > Where the lp tanks have an advantage over hp's is when packing them,a >packed >lp has a lot more volume in it that a packed hp,due to that tank size >thing,but here we go again,who will overfill it,you lose the reg saftey >factor,and do you need the weight,my dives have been planed arround my tank >volume and the hp's have been plenty, just remember as with any gear you >choose, pick it based on the big picture,safety. >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > ------------------------------------------------------------------- Learn About Trimix At http://www.cisatlantic.com/trimix/trimix.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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