Eheim Metric Tubing Conversion
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10-18-2005, 10:34 PM   #1
Momotaro
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Join Date: Feb 2003
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# Eheim Metric Tubing Conversion

Since it has been asked on the forum several times, here are the Eheim metric tubing conversions:

Eheim Metric Tubing Conversion
9/12mm = 3/8"
12/16mm = 1/2"
16/22mm = 5/8"
25/34mm = 1"
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 09-06-2011, 09:12 PM #2 150EH Planted Tank Guru     PTrader: (27/100%) Join Date: Dec 2004 Location: Churchton, Maryland Posts: 5,370 That ID or inside diameter! __________________
 09-06-2011, 10:16 PM #3 HolyAngel Planted Tank Guru     PTrader: (24/100%) Join Date: Oct 2010 Location: springfield, IL Posts: 2,777 the first number in mm is the inside, the second is the outer and the converted tubing size is Outer diameter. the inside should be the same but we dont have those fractions :P __________________ SunSun Pimp # 42 My 29G Planted 5G Betta Haven 20L Shrimp Breeder
09-10-2011, 03:01 AM   #4
150EH
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Quote:
 Originally Posted by Momotaro Since it has been asked on the forum several times, here are the Eheim metric tubing conversions: Eheim Metric Tubing Conversion 9/12mm = 3/8" 12/16mm = 1/2" 16/22mm = 5/8" 25/34mm = 1"
The coverted number is SAE (Standard American English) and is what you might see on a wrench or socket as a unit of measurement

3/8 - 1/2 - 5/8 - 1" are all the inside measurements of the tubing 12mm = 1/2" roughly.

The metric number that Eheim uses are ID first (ie 9/12) and OD is second. In English or SAE this would be 3/8 ID 1/2 OD

ID = inside diameter
OD = outside diameter

Sorry to be so thorough but I wanted no confusion.
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09-10-2011, 04:07 AM   #5
HolyAngel
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Join Date: Oct 2010
Location: springfield, IL
Posts: 2,777

Quote:
 Originally Posted by HolyAngel the first number in mm is the inside, the second is the outer and the converted tubing size is inner diameter :P
Edit: fixed! Thanks 150EH
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