I found this cheap on eBay and just got it in. The pictures didn’t show so I just noticed It doesn’t have the pin valve. I can see the hole has threads, but I wasn’t sure if the black knob was some sort of on/off they used back in the day.
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It's just a typical on off valve. -
Old CO2 tank ... I wish they made HPA like that ...
the on/off is built into the tank valve so you can use it in ASA that don't have the pin (like cocker VASA 😅)Love my brass ... Love my SSR ... Hard choices ...
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I have an HPA tank that is expired but setup that way, it is cool but more difficult to fill and the air coming out is not regulated. With most old guns that are designed to use CO2 the output pressure of the tank is not a big deal but with the new markers having an input pressure of 4.5k most new markers could not handle it. (The tank is past it's 15 year lifespan and has not been filled since 2010 if i remember correctly.)
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Yep, it's an on/off. Smart Parts made one that was a universal anti siphon tank. Screw it in to the furthest in position where the on/off was oriented upward and turn it on.
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Thanks for responses everyone.Comment
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Are you planning on filling the tank or taking it to your local field to be filled?
Either way i would learn how to fill that tank since it is going to be slightly different than a standard CO2 fill. If you take it to your local field to be filled if they have never filled one before they may have trouble and or may say no out right.
To fill the tank:
Check the date (born on and hydro date) it should fall in the 2" rule but i have not filled CO2 in years so not sure if CO2 still falls in that ruling.
Open the tank, make sure what position the knob needs to be in so the tank is open and closed.
Connect the fill station to the tank.
Make sure the knob that is designed to depress the pin is all the way screwed in.
Verify one more time that the tank is open.
Follow standard CO2 filling from here chill, fill, weigh, etc
Disconnect
Close the valve on the tank
vent the excess gas
Verify that the valve is closed
Remove the tank from the fill station and unscrew the knob that depresses the pin on the fill station
I recommend you connect the tank to your marker right away.
Do not forget if you have an ASA with on off you need to make sure the ASA is on before you open your tank
If you have kids or people around that will mess with the knob i would recommend putting something over the knob or finding a way to stop it from being fiddled with.
I remember a kid opening the valve for my tank and it scared him so he jumped back and I had to jump on the tank to stop it from flying around, for some reason i do not remember it missileing but it moved and was scary none the less.Comment
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Whenever I see 3.5oz tanks with on/off valves I assume they were used in multi-tank setups.
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Two things:
The threaded output hole should be able to accept a Schrader valve- that is, a typical tire valve. People actually used those- not particularly wisely- back in the day, and in your case, it could be a "back up" seal against a very-probably leaky on-off valve.
Yes, you can screw that straight into a Phantom or pretty much any other Nelson based pump, or conventional brass.
Second, peel that tape off before you try to fill it. The bottle qualifies for the 2" rule, but somebody may have scarred or damaged it- or even tried to drill it or something stupid, and hid it- or even tried to "fix" it! - with the tape.
Chances are they just put it on for padding, probably because it was used on the front of a VM-68 or something and became a sort of front handgrip, but it's worth checking. (And it's just cheap tape.)
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Assuming the bottle is good, a standard pin-valve is more reliable. Over the years, the only on-off valves I ever had that never eventually leaked, were the original "Thermo" valves, the giant old-fashioned ones.
A little 3.5 like that with an on-off, was generally used for a dual-bottle setup on a VM-68. You'd screw in the little one as a foregrip, and to "block off" the front ASA, then you'd screw in a 20 at the back bottle or bottomline ASA. The valve kept the little tank from opening 'til the back bottle could be installed, and most players considered it a "Backup"- you didn't open the 3.5 unless you ran out of gas in your main tank in the middle of a game.
Doc.
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I am seconding what Doc said. Remove the tape and inspect the tank before you use it.Comment
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