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Discussion Starter #1
Bought a brand new JT ion zombie ready 2 play kit. Came w 9 oz co2 and adapter. Everything worked great. Went and bought big tank (23 oz I believe) took adapter off screwed big tank on and hissed threw barrel really fast, like a fire extinguisher. Am I supposed to have some kind of different adapter? Tank also brand new. Plz help???
 

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Try cocking the bolt back before screwing the tank on.

Leaks like this are almost always the cup seal. If it's not that, it's the valve orings. It may seem like the tank could have caused it, but I think it's a coincidence.
 

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I'm pretty sure i Cocked it back after reading some stuff online. have a Tippmann 98 a friend gave me put it on there, cocked still did the same thing. is there different o rings I need for the bigger tank or something? I will go back to Dick's Sporting Goods and get tank refilled today and try again. thanks for responding so fast. like I said the little tanks with the adapter work fine. Idk??
 

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when you get the ready to play kit the little 9 ounce co2 tanks they sell have a smaller threaded end on them so you have to put the adapter on first then the small tank
 

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ya its not a 9oz its a 90gram, really dumb of them to include those as you cant refill them.

Here is the gist of it though, the tank can not cause the marker to leak through the barrel, cant happen. Nothing about the tank will cause the markers valve assembly to start letting pressure through, this has to be a marker issue. Unfortunately for you, JT is not a brand that is well known for quality (as far as markers are concerned at least) If I were you I would replace the valve body o-rings, usually on markers like yours these are size 015 which is the same size for tank o-rings. The valve is in the lower tube of the marker, right under the breach. the front cap on the lower tube will unscrew, you will also need to remove the trigger frame, once you have the cap off there will be a spring and the cup seal for the valve will come out. on the bottom side of the body there is a screw that holds the valve in, a lot of times it is brass. unscrew that and take the valve out the front of the marker, sometimes you will have to push it out with a long pen or something from the back of the marker.

REPLACE both o-rings on the outside of the valve body, do not just look at them, you can not tell by eye if they are good or bad (unless they are completely broken of course)

When you put the valve body back into the marker the large hole faces FORWARD, put the set screw back in place, cup seal back in (metal stem goes into the valve first) then spring and cap, put grip frame back on and test.

I would be a little surprised if the new cup seal let out so early, but on the other hand it is a JT marker, replace the o-rings first, they are cheap, cup seal is not expensive but no need to buy another one without replacing the cheap stuff first
 
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