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what do you guys do as far as using copper tubing for your compressor lines? i was thinking of running them 3/4 all the way around my garage with 3 or 4 outlets then to adapters. what have you guys done for an air dryer when using copper lines? is that pipe diameter good or go smaller/ or bigger? i have a 150 psi, 80 gallon compressor. i use all garage tools including spray guns- any input helps, thanks
 

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my shop at work used SC40 1" PVC pipe 120gal air tank at 150 with no problems at each drop let the pipe go down about 1 foot from airline connections with a cut off valve so the water in the line drop below hose connection and you can blead the lines.if you get build up in the lines. I would not go smaller or you will loose air useing high cfm tools as impacks ,drills, die grinders,and things like that.PVC is cheaper than copper and can be added to alot too easier. just my 2 cents my little shop is about 10 years old and it is holding up fine.
Jim
 

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cool. we have a plumbing shop and plenty of everything laying around, so thats why i was thinking copper. something about pressurized air and plastic makes me nervous......holding 10 years is a lil reassuring though thank you! and yes it is cheaper and faster to install.......so thats two nice things to keep in mind.....

well u guys sold me- haha
 

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i plumbed a whole machine shop with pvc pipe and they are still using the setup. this was about 3 years ago. works fine with no problems and is very easy to install.
 

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I did my shop with PVC and have had several people say Im crazy. So far so good (over a year) and I keep 120psi on the lines all the time with cutoffs just before the chucks/hose reels.
 

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I used 1/2" "L" type copper. It's thicker than "M" type. I wouldn't use PVC if it lets go it can cause serious injury, I don't think it is recommended.
 

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my shop has 1" for the majority of the shop and then tapers down to 3/4" the further from the compressor. Something about air velocity and all that crap...

Money permitting, go copper...
 

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Copper "L" type. 1/2" should be plenty unless you run a BIIIG air hog tool or a long run. I run a 1/4" die grinder and a 4" air grinder just fine with 1/2" YMMV. A lot of people make a cheap drier by have in a large diameter vertical pipe near the compressor. The air slows down and cools releasing the moisture. I never did it cause I have an 80 gallon tank and my duty cycle is pretty low.

PVC is not good for air. Oils from the compressor can and will compromise the strength. In addition, when the PVC breaks it shatters and the shrapnel is like a grenade. I know of one machine shop that originally plumbed in PVC and changed out after a few years . Being shut-down several hrs for a repair is pretty expensive in the production business.
 

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I used 3/4" copper with drop legs at each outlet with a valve to drain water. For a dryer for painting I use a water/oil seperator/dryer mounted with a quick connect that I can move to any of the outlets if needed. I also have hose reels mounted to the ceiling.

Use copper and you wont have to question it. PVC is not recommended. If your shop is subjected to freezing temps, PVC will not last long if there is water left in a line.
 

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It's not that PVC pipe is not recommended, it's illegal! Now I don't need to hear how many years you have had it in service at your house/work, it is absolutely not to be used for any compressed gas under any circumstances. I spent 30 years as a pipefitter and I have read the warnings, and seen the aftermath of people who used it improperly. PVC pipe under pressure from compressed air is a time bomb waiting to go off. The bad thing is you won't know when it's going to explode, and it does explode, just like a shrapnel grenade. There will be sharp plastic projectiles flying around your shop. How would you feel if it left your wife or kids blind or dead. It's not worth it, use copper, iron pipe, or a plastic that is made for compressed air. The little more you spend on the right stuff is definitely worth someone's sight or life.
Please read all of this site before you decide to pipe your compressed air system.

http://www.osha.gov/dts/hib/hib_data/hib19880520.html
 

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Lots of views, but no replies. I hope that means that I have convinced you to pipe your system with the correct materials. It's certainly worth the expense to make sure that you, your family, and friends are safe.
 

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plastic sch 40

I have used the schedule 40 plastic pipe with no problems . The art casting shop nearby will wear out the 90's in the plastic from the air friction. They have die grinders that run constantaly. Have had no problems with mechanic usage for the last 9 yrs, 165-175 psi normanl line pressure- I/R T30 compressor. Tres...
 

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Use copper, AZFairlane hit it right on the head, I know many folks use PVC but it just isn't the right way to do it.
 

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Same PVC lines for somthing like 6-7 years in the Texas temp range of winters around the 10's to 30's and 100-104* heat in the summers and not one problem/failure. And even though lately I don't work out in the shop as much as I used to, the lines still see air pressure most of the time because I tend to forget to close the valve & bleed of the line pressure when I'm done for the day.

I'm not saying using PVC is right or wrong..........I'm just stating the results so far.
 

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I'm a little disappointed and confused. I thought the people here were more intelligent and had more common sense than this. At least when shown the facts of why this should not be done under any circumstances, they would acknowledge that fact and agree something should be done to correct the situation before any damage or injuries happen. But I guess it all boils down to "I've been doing it for years and it can't happen to me". Truly an ignorant way to go through life. When that air line explodes, if you can, let us know how that worked out for you.
 

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I'm a little disappointed and confused. I thought the people here were more intelligent and had more common sense than this. At least when shown the facts of why this should not be done under any circumstances, they would acknowledge that fact and agree something should be done to correct the situation before any damage or injuries happen. But I guess it all boils down to "I've been doing it for years and it can't happen to me". Truly an ignorant way to go through life. When that air line explodes, if you can, let us know how that worked out for you.
It doesn't suprise me one bit. It is no different than people that want a 1000 hspr to run 8's then complain they need to buy a new helmet or new belts.:confused:
 

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Discussion Starter #20
AZ- i am a licensed plumber for 130 in chicago........and i share your view. i invision if i bang into that airline in the winter time (which can be -15deg or so sometimes here) and its pvc it will shatter and blow razor sharp peices all over the garage. i've broke off 4" floor drains in basements (to level with the floor for the cover to go on) and we just hit it with a hammer because it is in the concrete it shatters and if a piece hits you it cuts you open. i was really checking what size people used in copper, haha but then it sounded tempting to do in PVC. the plumbing company is my brothers with me being the main employee so i have free, ready access to anything copper i need as well as drills, torches, fittings, anything we use at work daily.
so, in copper, i will probably do most of the run in 3/4 and then some of the branches towards the ends of runs terminate it at 1/2" for the last outlet. pvc is cheap and easy but i can easily do copper and add on just as easy later........its not like water piping dealing with water/ solder issues of adding later. thanks all. does anyone use those "at the gun" disposable air dryer/filters......they are usually like a 2 or 3 pack? i seen a few filter/dryer set ups but they are like $600 this is my own home garage and thats overkill for my app----- the toss aways would do for painting, if they work?
 
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