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09-30-2007, 09:50 AM   #1
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## Adjusting for Elbows in Gas Line

Do you need to adjust for elbows for when determining the gas line size?
If so, what is the adjustment factor (ie 4 feet for 90 degree elbow, etc.)
TIA

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09-30-2007, 12:46 PM   #2
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I've heard of adjusting for elbows on vent lines, such as for a clothes dryer, but I do not know of any reason to do so on a gas line. The pressure is maintained in gas pipes by the gas flow, no matter what the configuation.
Mike

 09-30-2007, 01:30 PM #3 Member   Join Date: Apr 2007 Location: Downeast Maine Posts: 999 Rewards Points: 500 (As I'm sure Clutchcargo knows ) In any pressurized system there are friction losses which increase with length of pipe, number of bends, speed of flow, and as diameter decreases. I have no idea if those friction losses are enough to require that you account for them in gas plumbing, just saying that they definitely are a factor in pressurized systems, Mike. The pressure of gas flowing through a pipe will be less near the outlet than at the inlet.

 10-01-2007, 01:05 PM #4 I have gas!     Join Date: Mar 2007 Location: Massachusetts Posts: 1,975 Rewards Points: 1,374 Found it. The equivalent length for these pipe sizes are: 90° Elbows: 3/4" = 1' 1" = 2' Tee (run): 3/4" = 0.5' 1" = 0.75' Tee (Branch): 3/4" = 2.5' 1" = 3.5' Gas Cock: 3/4" = 4' 1" = 5' __________________ I tear things down and build them up.

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