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>Is there anyone out there using two steel 72s as doubles? I have a set - for the money (the cost of the manifold + $20) they can't be beat. They move through the water nicely, and have nicer trim/balance than a big single tank. With a modest overfill, they hold a reasonable amount of air, and with all the advantages proper doubles have. Nice middle-of-the road buoyancy, perfect BTW for diving wet since unlike bigger doubles they leave a reasonable but not odious amount of weight on the belt. If a reasonably priced manifold can be obtained (I found a used Scubapro isolator here) they are a great alternative to a big single. Only problem, they cost twice as much to fill and hydro. The other tanks I hear good things about as doubles are the 85 cf Farbers - not much bigger than the 72, and lots of air at 3000 psi. >> Your statment would be true if steel 72's did indeed hold 72 cu.ft. of >>air, but they hold around 68 cu. ft of air with the plus stamp and a >>little less >>if you don't get the plus rating on the next hydro. No. They hold 72 (actually 71 plus something) with the plus stamp, and 68 without it. Most shops I frequent seem to fill them to about 2500 regardless of whether they have the plus stamp - good thing, one of my 72's has the + and the other doesn't so if they didn't, I'd have to close the isolator so they could put different psi's in each :-) -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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