"OldCorps"Dive shop charges $8 for 4500 fills from empty or anywhere in between. They fill it in a water tank to help keep it cool. My 74 cf cubic foot tank ends up with 4300 by the time I get home with it (about 40 minute drive) and stays there. 3K fills are $7 but when I took my scuba tank in last time they filled it up to 3K from about 1900 and didn't charge me anything for it. They said "that's just a top off, no charge". Nice people, I'd hate to lose them!
Ed
This time I took both tanks in and they filled the cf tank from about 2800 to 4500 & the scuba from about 1800 to 3000. The charge? $7 TOTAL! I actually think he overcharged 'em a little bit because when I got them home I had 4500 and 3000psi. Man, I hope these guys never go out of business!
Ed