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  • Hippy

    Active Member
    Mar 11, 2008
    367
    Frostburg Md
    Wondering where to purchase a 4500 PSI Tank to fill my PCP--I see some on Flea Bay that need Re certified AKA Hydro testing --Like most people trying to save a $$

    Thanx,
    Jim
     

    smdub

    Ultimate Member
    MDS Supporter
    Nov 14, 2012
    4,642
    MoCo
    The 'value' of a used carbon wrap tank can be misleading. Have to get hydro'd every 5 years and are only good for 15. *NO ONE* will fill it after that (though you can buy your own compressor (showbox) and keep filling it yourself.) Steel and aluminum tanks are good forever (until they fail hydro) but are HEAVY in comparison. I bought my carbon tank from Joe Brancato(sp?) or the AirHog guy. Those are the two that advertise most heavily on the yellow forums.
     

    J-Dog

    Ultimate Member
    Mar 9, 2012
    1,789
    NOT what I thought this thread was about...

    5388df6236e3e.image.jpg
     

    John from MD

    American Patriot
    MDS Supporter
    May 12, 2005
    22,728
    Socialist State of Maryland
    OP do you really need a 4500? I have several PCP's Crosman and Airforce and I use 3000 PSI scuba tanks. On my smaller reservoir I top them off with my hand pump if I only shoot ten shots or so.

    First of all, when they are tuned, most PCP's get their best strings from 26-2700 on down to about 2000 PSI. You can get used tanks for under $100 at many of the dive shops in the area. Filling them up only costs $5 to $7. Very few places can service a 4500 tank.

    Like others have said, they are expensive and they are only good for 15 years.

    BTW, don't think of buying a paint ball tank. They have a regulator in them that limits them to a max of 850 PSI.

    Regards,

    John
     

    smdub

    Ultimate Member
    MDS Supporter
    Nov 14, 2012
    4,642
    MoCo
    OP do you really need a 4500? ...
    First of all, when they are tuned, most PCP's get their best strings from 26-2700 on down to ...

    And there is the advantage. A 3ksi tank needs to be refilled when it hits 2.7 for that particular gun (or have to use two tanks one to bulk fill & one to top off). A mere 300psi delta. A 4.5ksi tank has a delta of 1.8ksi. SIX times more useable air. You really do get a lot more fills out of a higher pressure tank if you can find somewhere to fill it.
     

    BigDaddy

    Ultimate Member
    Feb 7, 2014
    2,235
    And there is the advantage. A 3ksi tank needs to be refilled when it hits 2.7 for that particular gun (or have to use two tanks one to bulk fill & one to top off). A mere 300psi delta. A 4.5ksi tank has a delta of 1.8ksi. SIX times more useable air. You really do get a lot more fills out of a higher pressure tank if you can find somewhere to fill it.

    That could only be true if your carbon fiber tank is the same size as a scuba tank.
    These carbon fiber tanks are tiny little things, ranging in volume from 0.8 to 1.6 liters.

    Scuba tanks aren't measured the same way. 80 cu. ft is 80 cu ft of compressed gas. From here the math gets pretty hairy but extrapolating from European 12 L scuba tanks, the volume of a US tank is 11.3 L

    While you are correct about the pressure delta, size matters:lol:
     

    Vic

    Ultimate Member
    Jul 2, 2010
    1,454
    Whiteford, MD
    I bought a small paint ball tank that is rated to 4500 and just bought a regulator for 3000 psi. It works great. Its about the size of a football and is good for hunting. A lot easier than carrying a pump in the woods. I think I paid $300 for it. It is a carbon fiber tank.

    Vic
     

    smdub

    Ultimate Member
    MDS Supporter
    Nov 14, 2012
    4,642
    MoCo
    That could only be true if your carbon fiber tank is the same size as a scuba tank.
    These carbon fiber tanks are tiny little things, ranging in volume from 0.8 to 1.6 liters.

    Scuba tanks aren't measured the same way. 80 cu. ft is 80 cu ft of compressed gas. From here the math gets pretty hairy but extrapolating from European 12 L scuba tanks, the volume of a US tank is 11.3 L

    While you are correct about the pressure delta, size matters:lol:

    Size matters (thats what she said!) My carbon tank *IS* the size of a (small) scuba tank;) I have an 88cuft airhog (9L of water volume.) Still extremely light.
    http://www.airhog.com/A25_Large Tank Page.html
    Same volume of air at higher starting pressure = more useable air.
     

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