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Old 10-30-2008, 11:13 PM   #1
thedude123
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Default Gas Dip Tube

Do I have to have one of these? I was cleaning my pin lock kegs that I bought a while ago and noticed that they don't have gas dip tubes.

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Old 10-30-2008, 11:26 PM   #2
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Hrmm, will the gas in fitting seal without one? I mean, the poppit? Have you pressurized them without them? If they hold pressure without them, then I dont see why you would, they dont really DO anthing.

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Old 10-30-2008, 11:55 PM   #3
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No I haven't pressurized then yet. I will try when I get home and see what happens.

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Old 10-31-2008, 12:12 AM   #4
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I know on my ball locks, the poppets sits atop the flange at the top of the gas dip tube... without that tube, I dont know that the poppet would seal properly.

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Old 10-31-2008, 01:00 AM   #5
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The keg will leak without the tube and o'ring because the tube supports the o'ring so it will seal on the sides as well as the tube itself. You need to find the tubes or have a machinist make a solid machined version of the tube.

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Old 10-31-2008, 02:16 AM   #6
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Look closer. Pinlocks have VERY short gas tubes. I mean, like 1/4" long, just enough to hold the Oring in place. It's pretty common for the tube to stick inside the post when you remove it.

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Old 10-31-2008, 02:20 AM   #7
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Quote:
Originally Posted by Bobby_M View Post
Look closer. Pinlocks have VERY short gas tubes. I mean, like 1/4" long, just enough to hold the Oring in place. It's pretty common for the tube to stick inside the post when you remove it.
Yuppers... I wondered where half of mine were when I was breaking them down...
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Old 10-31-2008, 12:52 PM   #8
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Quote:
Originally Posted by The Pol View Post
...they dont really DO anthing...
WHAT?!?!?!

Sure they do. The o-ring on the dip tube applies upward pressure on the poppets to keep them sealed.
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Old 10-31-2008, 12:57 PM   #9
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They also apply downward pressure on the Oring so that it bulges outward to seal between the post and keg.

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Old 10-31-2008, 12:58 PM   #10
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Quote:
Originally Posted by Bobby_M View Post
They also apply downward pressure on the Oring so that it bulges outward to seal between the post and keg.
Yep, that's what the post does...
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