Anti-Siphon Tube on my Co2

[Greg]

Today I installed an anti-Siphon tube on my tank, it turned out to be easyer than I thought it might.

First thing, I did was look up some how-to's online so I knew what the hell I was doing. It seemed awfuly easy, so I set out on my quest.

Before I went to the store I decided to remove my valve to make sure I could install it properly, turns out it will not be a problem. So I grabbed the disemtaked(real word?) valve and headed for the local homedepo. After looking around for a bit I found just what I needed. The part number on the bag reads A-22, it will fit right into the tank end of the valve and should crimp the copper tube just fine.

Parts I used:(see first pic)
part # A-22 from the homedepo plumbing section. This included 3 parts: The nipple, coller, and a little tube (this little tube is not used when using copper pipe, you can just set this asside).

Thread sealant
A little teflon tape
My old on/off valve (with valve knob and burst disc removed)

The second pic shows the order in witch the parts go together: The valve, the nipple with a little teflon tape on the valve end, the coller, and the copper tube.

First, I screwed the nipple into the valve and tightned nice and snug. When I tried to attach the tube and coller I found that the tube did not stay in the coller very well after tightning it down, I decided to go ahead and solder it in place.

Alignment: This is probably the second most important part of the project, if you don't have your tube aligned so that it points up when installed onto your gun, you will have wasted your time compleatly. Insted of and anti-siphon tube, you might end up with a siphon.
To align properly, screw your valve (with or without the tank) into your gun's ASA and put a mark on the top of the valve, this is the direction you want your tube to point when finished. Note: This means that your tank will only work properly on YOUR gun or a gun witch happnes to line up properly.

Now that you know what direction you want it to bend, now, just bend it. Idealy the end of the tube should just touch where the straight cylinder porting of the tank meets the round sholder at the top. Mine turned out to be a little long, because of this it may still take in a little bit of liquid on a full tank.

The third pic shows the compleated valve/tube assembly ready to be installed. You can see that the tip of the tube is a little further down the tank than it should be, but I think it will work just fine.

Finaly, I installed the valve back onto the tank, THIS IS THE MOST IMPORTANT PART OF THE PROJECT!!!!!
If you do not install your valve properly it may sperate from the tank when trying to remove it from your gun. I have heard of a news report inwhich a lady was killed by a tank witch seperated from its valve. THIS IS NOT SOMETHING TO HALF ASS!!!

Before screwing the valve on, I checked to make sure everything would fit in and thread properly. Then I applied some thread sealent and torqed it down to 30 ft-lbs, this might not soud like a lot, but too much could damage the threads.

The last pic shows the compleated tank and the tools I used during the process.

All in all it was a pretty simple project. I probably spent more time with this writeup than I did actualy installing the thing (even while pausing to take pictures).

The nipple package cost me about 1.75, and the nice man at the store gave me a few inches of copper tube for free. I probably spent more in gas driving than I did in materials. However, if you don't feel that you can do this properly, feel free to go to your local shop and have them do it. It should only cost around $10, saving 8 bucks isn't worth the risk of not doing something right. Needless to say, I am a little paranoid about it, and for a while I will be very carefull when removing it from my gun, better safe then sorry.

[Greg]

well, after several months of play, and numerous fills, this tank is still working great. The on/off valve is a little leaky due to its age, but thats to be expected. I do still notice a few snowflakes shooting out the barrel when I first get the tank filled, but this quickly gives way to nice consistant shooting.