air compressor hose diameter?
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Senior User
Joined: Oct 2005
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From: NW NJ
air compressor hose diameter?
Looking at impact guns, etc for a new air compressor I'm buying, most of the model's specs require a *minimum* hose diameter of 3/8". Is there any advantage to buying bigger hose ... 1/2"?
Is it a function of hose length? I have not decided, but I will probably buy a 25' reel of hose, possibly 50' for more access out to the driveway.
i guess good 'ol rubber hose is the way to go? Lays flat? Remains flexible in cold weather?
Thanks for any info
Is it a function of hose length? I have not decided, but I will probably buy a 25' reel of hose, possibly 50' for more access out to the driveway.
i guess good 'ol rubber hose is the way to go? Lays flat? Remains flexible in cold weather?
Thanks for any info
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
Originally Posted by ironmine
Looking at impact guns, etc for a new air compressor I'm buying, most of the model's specs require a *minimum* hose diameter of 3/8". Is there any advantage to buying bigger hose ... 1/2"?
Is it a function of hose length? I have not decided, but I will probably buy a 25' reel of hose, possibly 50' for more access out to the driveway.
i guess good 'ol rubber hose is the way to go? Lays flat? Remains flexible in cold weather?
Is it a function of hose length? I have not decided, but I will probably buy a 25' reel of hose, possibly 50' for more access out to the driveway.
i guess good 'ol rubber hose is the way to go? Lays flat? Remains flexible in cold weather?
It really depends on how many CFM the tool demands. It is a function of length as far as friction goes. For a 1/2" impact gun on 50' of hose you should be fine. Rubber hose is perfect for garage work, it does lay flat and is abrasion resistant. PVC less so. The thin ureathane ones are nice for construction but not very durable in the garage.
Elder User
Joined: Feb 2004
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From: Ocean Park WA
3/8" hose will operate anything up to 1/2" impacts just fine as long as your compressor is big enough with a big enough tank. For 3/4" and 1' Impact I prefer 1/2" inch with detroit/claw fittings but these require dedicated line with a shut off valve and be sure to use the retainer clips. This is normally overkill for the average home or shade tree mechanic but then I do a lot of heavy duty work.
Post Fiend
Joined: Jun 2002
Posts: 13,873
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From: Atlanta GA
> Is there any advantage to buying bigger hose
Yes, as a matter of fact I am ditching my 3/8 unless I can find a way to go to bigger then the 1/4" connectors on my impacts. It is a serious restriction with a 120v compressor.
Yes, as a matter of fact I am ditching my 3/8 unless I can find a way to go to bigger then the 1/4" connectors on my impacts. It is a serious restriction with a 120v compressor.
I'll have the Roast Duck
Joined: Jul 2002
Posts: 9,622
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From: Northshore, MN
Originally Posted by rebocardo
> Is there any advantage to buying bigger hose
Yes, as a matter of fact I am ditching my 3/8 unless I can find a way to go to bigger then the 1/4" connectors on my impacts. It is a serious restriction with a 120v compressor.
Yes, as a matter of fact I am ditching my 3/8 unless I can find a way to go to bigger then the 1/4" connectors on my impacts. It is a serious restriction with a 120v compressor.
Posting Guru
Joined: Sep 2004
Posts: 1,616
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From: Sapulpa OK
Most tools have 1/4" pipe connections, so 1/4" fittings usually are adequate. The big restriction is a long legnth of 1/4" hose. Doubling the hose size increases the flow rate by a factor of 4. Therefore increasing the hose size by 50%, the flow rate is increased by a factor of 2. In other words 3/8" hose flows twice the air as 1/4" hose for a given legnth.
What I do to utilize my tools to their fullest is increase the operating pressure of my supply up to 150 PSIG. That way I am sure of getting at least 125PSIG at the tool.
What I do to utilize my tools to their fullest is increase the operating pressure of my supply up to 150 PSIG. That way I am sure of getting at least 125PSIG at the tool.
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Senior User
Joined: Jul 2006
Posts: 384
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From: south jersey
Harbor frieght has a few very good deals on goodyear rubber air hoses. i bought some cheap pvc hose when i first got my compressor and the pvc hoses are junk. THey dont roll up easy and the connectors have blown off a few times, and when its cold out dont even think of bending them or moving them around.http://www.harborfreight.com/cpi/cta...emnumber=30268
http://search.harborfreight.com/cpis...ibuteSearch.do
http://search.harborfreight.com/cpis...ibuteSearch.do
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Post Fiend
Joined: Jun 2002
Posts: 13,873
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From: Atlanta GA
Thank you for the tip on Praxair, there is one located not even 20 miles from me!
> is increase the operating pressure of my supply up to 150 PSIG.
Many tools are only rated for 90-110 psi, running them at a higher pressure I would not do. I made an adapter hose so I can measure the pressure at the tool end and adjust the compressor until I get 90 psi at the tool end.
I do not use 1/4" hose for anything except for filling tires.
> is increase the operating pressure of my supply up to 150 PSIG.
Many tools are only rated for 90-110 psi, running them at a higher pressure I would not do. I made an adapter hose so I can measure the pressure at the tool end and adjust the compressor until I get 90 psi at the tool end.
I do not use 1/4" hose for anything except for filling tires.
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