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  #1  
Old 04-16-2018, 05:59 PM
bayoubengal bayoubengal is offline
 
Join Date: Feb 2018
Location: Perry GA
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Default Compressed Air Hose Size

Hooking up my compressor. Any pros/cons for 1/4 or 3/8 line?
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  #2  
Old 04-16-2018, 06:07 PM
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scard scard is offline
 
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Location: Cedar Park, TX
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For building an RV? Unless you are going further than 500' with 1/4" hose, NO. It doesn't matter.
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  #3  
Old 04-16-2018, 06:14 PM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
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Default Building or painting

For building (riveting, drilling, etc) I use a 1/4 line long enough to cover my work area.
For painting (HVLP) I use a 3/8" line.
Maybe it doesn't matter. I've sprayed with the 1/4" with no problems.
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  #4  
Old 04-16-2018, 07:22 PM
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az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
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Use this handy little chart -



A 5 cfm die grinder at 100 ft has a pressure difference of about 10 psi for a 100 ft of 1/4 vs 3/8. probably would have no effect.

However, if you have a big honking compressor and have tools that use a lot of CFM, then the bigger hose size would be better.

I sometimes need almost 100 ft lines to get air out to the ramp in front of my hangar.
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  #5  
Old 04-16-2018, 07:59 PM
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SMO SMO is offline
 
Join Date: Oct 2007
Location: Salmon Arm, BC
Posts: 932
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My die grinder and my orbital sander run noticeably stronger with the 3/8 line. I use 1/4" line for my 1/4" drill, rivet squeezer, cleco remover, and pull riveter.
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  #6  
Old 04-16-2018, 08:19 PM
coffeeguy coffeeguy is offline
 
Join Date: Jul 2015
Location: Lake in the Hills, IL
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Looks like I overbuilt. Story of my life. Put in 3/4" Rapidair line to my basement and garage and have 3/8" hoses. I have added the 1/4" flexible Cleaveland hose for ease of use the last few feet. And when I cook I always have leftovers...
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  #7  
Old 04-16-2018, 09:16 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,557
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Hoses have differing flexibilities. I prefer the more flexible ones - to me, with my limited hose lengths (typically 25' or 50') that's more important than size. However, I haven't painted with these yet.

Dave
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  #8  
Old 04-16-2018, 10:43 PM
gasman gasman is offline
 
Join Date: Mar 2007
Location: Sonoma County
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Quote:
Originally Posted by coffeeguy View Post
Looks like I overbuilt. Story of my life. Put in 3/4" Rapidair line to my basement and garage and have 3/8" hoses. I have added the 1/4" flexible Cleaveland hose for ease of use the last few feet. And when I cook I always have leftovers...
When plumbing for air, consider each 90 degree elbow to have the same loss as 20 feet of same size pipe...... you can't overbuild.
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