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Old 01-09-2009, 11:53 PM   #1
bmgd70
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Default blowoff tube

if i were to make a blow off tube using my 3 piece airlock (the cheap plastic one that comes with kit) and tubing, does anyone know what size of tubing that would fit onto the inside of my airlock? of course the tubing's diameter that came with my kit was not large enough. just thought i would ask so i dont have to measure. i'm lazy, plus i dont want to risk contamination with a tape measurer and all that stuff.

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Old 01-09-2009, 11:57 PM   #2
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3 ft. of 5/16" vinyl tubing, I believe. Allow the experts to chime in before acting on my advice, however

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Old 01-10-2009, 12:02 AM   #3
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If you only have smaller tubing it can be inserted into the stem of the airlock.

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Old 01-10-2009, 12:13 AM   #4
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5/16 is what came with the kit. and after much forcing and frustation i couldnt get it in the stem, so i'm guessing 7/16 or 1/2 will fit over the stem.

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Old 01-10-2009, 12:30 AM   #5
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Quote:
Originally Posted by bmgd70 View Post
5/16 is what came with the kit. and after much forcing and frustation i couldnt get it in the stem, so i'm guessing 7/16 or 1/2 will fit over the stem.

Your answer is 7/16. You should be able to get some at a hardware store.
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Old 01-10-2009, 01:46 AM   #6
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thanks impatient

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Old 01-11-2009, 03:04 PM   #7
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I just had to make a blow off tube yesterday and I bought 1/2" ID hose. It fit perfect on my 3 piece airlock.

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Old 01-11-2009, 03:12 PM   #8
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Just take your airlock with you to the hardware store and try out a couple until you get the right fit. That's what I did.

But FYI, 1/2" ID tubing is what fit over the stem on my airlock.

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Old 01-11-2009, 03:17 PM   #9
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I stuffed 3/8" tubing, or whatever fits the autosiphon, into the center tube of a 3-pc airlock. It also stuffed into the bung. It's hard to get 'er in there, but here's evidence it IS possible...

Using airlock...



Directly into bung...



I had a blowout, as near as I can tell it was due to a clogged 'X' at the bottom of the airlock's center tube (hence the reason the airlock disappears in photo 2). I've since made it a habit to cut those suckers off since they serve no purpose anyway.

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Old 01-11-2009, 04:38 PM   #10
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I use 5/8 inch OD which has a 1/2 ID.

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