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Air Comp fittings and hose

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freebo86

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Jun 19, 2015
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362
I'll get straight to the point and this should be fairly simple.

1) Is there such a thing as 3/8" hose but its only actually 1/4" in diameter inside? Everyone says get a 3/8" hose but I am assuming they are referring to the I.D of it actually being 3/8'?

2) Looking at getting V style high flow fittings. Are the couplers V style unique also, as in are they bigger diameter inside? Or can I get away with just getting male/female V style fittings and re-use my existing couplers?

What I am confused about is, do I get 1/4" V style fittings and a 3/8" hose or should the hose also be 1/4"?

Use of compressor is just DIY at the home garage, not a commercial application.
 
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mineallmine

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May 22, 2014
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Ontario, Canada
freebo86 said:
I'll get straight to the point and this should be fairly simple.

1) Is there such a thing as 3/8" hose but its only actually 1/4" in diameter inside? Everyone says get a 3/8" hose but I am assuming they are referring to the I.D of it actually being 3/8'?

2) Looking at getting V style high flow fittings. Are the couplers V style unique also, as in are they bigger diameter inside? Or can I get away with just getting male/female V style fittings and re-use my existing couplers?

What I am confused about is, do I get 1/4" V style fittings and a 3/8" hose or should the hose also be 1/4"?

Use of compressor is just DIY at the home garage, not a commercial application.
Click to expand...

I just switched to V style couplings in my home shop and couldn't be happier. The bigger air tools work much better due to the larger volume of air they receive.

As to the couplers...not quite following you there. You say male and female fittings then mention couplers. My interpretation is the female fitting IS the coupler. You will need to use the V style female quick release coupler with the V style male fittings. You can get away with leaving the m style male fitting on low volume requirement tools as these will still work with the V style female coupler.(at least with the Milton V style couplers any way)

They do cost a little more money but in my opinion well worth it.

Mine is a home shop as well, no a commercial operation.

Also as stated before 3/8 hose with 1/4 fittings.
 
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Raisedonadeere

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Jul 31, 2017
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Central KY
mineallmine said:
I just switched to V style couplings in my home shop and couldn't be happier. The bigger air tools work much better due to the larger volume of air they receive.

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Click to expand...

I too need a bit more flow for my air impact. I have the 3/8 hose but cheap HF couplings which have done fine until I got the air impact a few years ago.

Could you give me a bit more verbiage on how to identify or track down V style or an equivalent. I am not familiar with that term even though I have probably worked with them in various shops.
 
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anndel

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Oct 28, 2015
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Hawaii, USA
3/8" hose comes with a 1/4" NPT thread (NPT = National Pipe Thread, an American pipe thread standard) so just look for that. The Milton "V" fittings should say 1/4" NPT and it'll work.
 
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freebo86

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Cheers and thanks for all the info! This is exactly what i wanted to know.
 
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BDT/NWMN

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Jan 22, 2012
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Erskine, Mn
Milton V Coupler-------The rest of the story.

They take far more effort to couple under pressure than the popular Milton type M coupler.

Milton does not recommend using them on an impact wrench without a whip hose.
Why???? Because the impact wrench will rattle the **** out of them.. They were designed for painting equipment.

My self; I use a whip hose on most of My air tools to avoid the extra clunkiness added by a coupler hanging onto the air tool. Switching over to the V couplers made a noticeable difference in some air tools.

For the sand blaster, 3/4" and 1" drive impacts; I use a larger coupler and hose.

The V coupler can be used with the type M male ends.. The V male ends will not work with a type M coupler.. I mention this because it is not necessary to change every coupler and male end in the shop when doing an upgrade..
 
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freebo86

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Jun 19, 2015
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362
So just stopped by the local air place here and found these, asked him for his High Flow fittings and he showed me this.. Topring, 1/4" thread on it.

The bored out hole is huge inside. $2 for one.
 

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freebo86

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So I came home and compared the above fittings to my existing ones. LOL! The old ones the O.D of the tip at the of the opening can almost fit inside the new ones I.D!! Huge difference in opening hole. That should make for a decent improvement.

I also tried these in a Milton V style coupler and they go in perfectly. Currently waiting on this to arrive; https://www.amazon.ca/dp/B001O2ZGQ6/?tag=atomicindus04-20

And I also have a 3/8" I'm getting. I'm looking forward to try my existing setup with this and see how much more power I get out of the tool.
 
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sberry

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Brethren, Michigan
I started with H and kept them, they work for larger tools also, the biggest I own is a 3/4 impact. They are not easy couple though but to change would be quite a few. 20 couplers or so and 50 plugs maybe. I do use them direct on the tool. Never had one wear out from it
 
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