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Old 09-02-2011, 08:35 PM   #1
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Default Silicon Tubing

I'm wanting to upgrade my tubing scattered throughout my system. I utilize 1/2 barb fittings and have been looking at the various offerings from McMaster Carr.

I "think" I want the 1/8 soft wall tubing. Honestly, that's a guess on my part. Basically I'll be plumbing a March pump and various connections to and from MLT, HLT, Boiler,etc.

What do you guys use? Suggestions?

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Old 09-02-2011, 09:00 PM   #2
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You want the 1/4" wall tubing. ---.5" ID & .75" OD

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Old 09-02-2011, 09:03 PM   #3
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Quote:
Originally Posted by PantherCity View Post
You want the 1/4" wall tubing. ---.5" ID & .75" OD
Sounds like 1/8" wall to me...
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Old 09-02-2011, 09:05 PM   #4
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How so??? .75-.5=.25

1/4=.25

1/8=.125

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Old 09-02-2011, 09:07 PM   #5
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Quote:
Originally Posted by PantherCity View Post
How so??? .75-.5=.25

1/4=.25

1/8=.125
Wall thickness is 1/2 of the diameter difference between ID and OD...

SO, ID: 0.50"; OD: 0.75" makes for .125" wall thickness...

Really basic geometry here, not physics...
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Old 09-02-2011, 09:09 PM   #6
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Quote:
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How so??? .75-.5=.25

1/4=.25

1/8=.125
Two walls!

.75 OD - .50 ID = .25 total wall thickness. Measured from one tube surface to the opposite surface, you pass through the wall of the tube twice - so you have to divide the total wall thickness by 2, giving you a 1/8" wall thickness.
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Old 09-02-2011, 09:12 PM   #7
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To the OP point, I use the .5" ID, .125" wall thickness stuff. Works great. I'm using the 'white' stuff, not the tan... More flexible.

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Old 09-02-2011, 09:14 PM   #8
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You guys are right. I'm an idiot!

I left my thinking cap at work for the holiday weekend.

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Old 09-02-2011, 09:19 PM   #9
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To the OP point, I use the .5" ID, .125" wall thickness stuff. Works great. I'm using the 'white' stuff, not the tan... More flexible.
Sounds like what I had in mind... Think I'll go for it.

Thanks Guys...
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Old 09-02-2011, 09:20 PM   #10
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You guys are right. I'm an idiot!

I left my thinking cap at work for the holiday weekend.
You trade it in for a "drinking cup"??
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