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Brand new HP100 air fills

Discussion in 'Tanks, Valves & Bands' started by apenland01, Dec 31, 2020.

  1. apenland01

    apenland01 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 25 - 49
    Location: Tucson AZ
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    Good advice, but unfortunately, I waited till the last minute to get the tanks filled for what might be diving Sunday. I'm fishing all day tomorrow and Saturday, so this was my only chance to get the tanks filled for the holiday weekend. Being in a hurry didn't help much in this case....
     
    Marie13 likes this.
  2. Kohanbash

    Kohanbash Solo Diver

    # of Dives: 200 - 499
    Location: PA, USA
    119
    30
    28
    I always remind the store of the fill pressure since HP100’s look similar to Al80’s.
     
  3. happy-diver

    happy-diver Skindiver Just feelin it

    # of Dives: 1,000 - 2,499
    Location: same ocean as you
    1,702
    1,069
    113
    Never take it back and question people right or wrong or right it's their joint and it pisses them off
    even of there's a coke freak filling your tanks to 150 bar the shop will eventually find out and fix it

    Next fill you strike up a conversation however brief where you feign interest
    ask about their procedure and the fill pressure of the tank escapes your lips

    If you are one of the wanting a fill NOW ones there is something very wrong
     
  4. Compressor

    Compressor ScubaBoard Supporter Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NYS
    3,346
    1,777
    113
    Just so you know @apenland01, you paid for a 100 to get filled and you got 84 cf of air.
     
    apenland01 and scubadada like this.
  5. bletso

    bletso Dive Shop

    # of Dives: 1,000 - 2,499
    Location: Louisville KY
    314
    120
    43
    Here is a chart I made up for local dive shop. You can get a pretty good idea of temp effects on fill pressure.
     

    Attached Files:

  6. Compressor

    Compressor ScubaBoard Supporter Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NYS
    3,346
    1,777
    113
    Thank you @bletso for the PDF file.
    What equation did you use for calculations? Boyle and Charles Law?

    Also curious on how you measure the tank temp? Does one shoot one to those Infrared temp guns?
     
  7. bletso

    bletso Dive Shop

    # of Dives: 1,000 - 2,499
    Location: Louisville KY
    314
    120
    43
    I use an infra-red temp gauge. We fill N2, He, Ar, and 75/25 welding gases. Not much scuba anymore.. (P1*V1)/T1 : (P2 * V2)/T2
     
    couv likes this.
  8. Barnaby'sDad

    Barnaby'sDad ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: Virginia
    1,188
    977
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    Sometimes it's not a matter of being unreasonable and "wanting a fill now." ex. For me...and I'm sure plenty of others that don't live in dive country...it's 1+ hour each way to get to a dive shop. I can't make the trip Monday to Friday during their business hours, so that leaves Saturday and Sunday.

    If a shop is unwilling to do same day fills (ex. Drop off at 9:00 am, run errands, and pick-up whenever they get to it), I would have to plan out two weekends in advance (they weren't even willing to do a next-day fill) just to have tanks filled and ready to go for a local dive day. Two days of driving...4+ hours drive time...to get a couple tanks filled.

    One shop that I did that drop off and pick up routine with (drop one weekend and pickup the next)…I came in to get my tanks and they were sitting where I left them...unfilled. The shop owner said "oh, well we don't close until 6:00 pm (it was after 5:30 pm when I showed up), I was planning on filling them." o_O Literally just two tanks sitting there a few feet from the fill station where I'd left them a week earlier...not dozens of tanks and mine just got lost in the mix or something. I just took the hint and haven't been back since.

    Some dive shops are not run like a business. They're a hobby. A place for someone with more money than they know what to do with to hang out, shoot the s**t with like-minded people, and live the dive lifestyle. The trick is identifying shops like that and avoiding them.
     
    tmassey likes this.
  9. boulderjohn

    boulderjohn Technical Instructor ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Boulder, CO
    26,887
    19,803
    113
    In my experience, AL 80 cylinders filled at a reasonable rate to 3,000 PSI will end up at 2,800. I worked for a shop that had a governor on their fill station to fill to that level, and every tank I ever got from there for instruction was at 2,800. I will bet that is what happened to you--you got filled to 3,000 and cooled to 2,800.
     
  10. p_kos

    p_kos Barracuda

    # of Dives: 200 - 499
    Location: Ontario
    283
    244
    43
    This shouldn’t happen, fill it at a reasonable rate to 3200 then.
     

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