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I am in the market for an air compressor to use for blowing out a home sprinkler system. Plans are to use this compressor to paint my garage walls. The questions that I have are, are there certain requirements that I need to look for in a compressor that would be good to use to paint with? Do I need to be worried about the CFM for painting? Or are there other areas on a compressor that I need to be concerned with for painting?

Also, any suggestions that I should look for when looking for a sprayer to hook up to the compressor to paint with. I am just planning on using the sprayer for home use. Any suggestions? Thanks!
 

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A compressor will work with a cup sprayer or ,possibly, an HVLP sprayer---

Both of those are for fine finishes like painting a car or spraying furniture finish.

Neither one will spray house paint. For that, you want a paint pump----which might be best rented for one project.

Yes, CFMs are everything with a sprayer---and also when blowing out a lawn sprinkler system. The sprinkler companies usually rent a tow behind compressor each fall to service their customers systems.
 

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A compressor will work with a cup sprayer or ,possibly, an HVLP sprayer---

Both of those are for fine finishes like painting a car or spraying furniture finish.

Neither one will spray house paint. For that, you want a paint pump----which might be best rented for one project.

Yes, CFMs are everything with a sprayer---and also when blowing out a lawn sprinkler system. The sprinkler companies usually rent a tow behind compressor each fall to service their customers systems.
Not "exactly" true, you can spray house paint with a HVLP gun if you thin the paint or rather, you are supposed to.

I used Behr exterior latex all in one for the first time with a Graco handheld airless and I couldn't get started with out plugging up even after using a larger tip size. I was using a pressure pot and had made a setup to used a Fuji 4 stage turbine with it. Used a 1.4mm tip with the paint without thinning and it never stopped. The setup did use a Worthy 60x50 mesh strainer but the Graco has a 60 mesh as well. A .013" was first tried in the Graco than a .015" tip but a 1.4mm equals around .055". It was slow but I was pressed for time as the weather was getting bad. I gambled and won that day. :smile:
 

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Two different purposes, two different tools. Renting a sprayer is the way to go. Usually about $50 or so for the day. Make it easier on yourself. Also, if you're gonna spray it, add about 1/2gal or so in product material loss for overspray and clean up.
 

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Two different purposes, two different tools. Renting a sprayer is the way to go. Usually about $50 or so for the day. Make it easier on yourself. Also, if you're gonna spray it, add about 1/2gal or so in product material loss for overspray and clean up.
That's a 1/2 gallon if you think it would take 1 gallon by hand.
 

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OK first to the best of my knowledge (quite limited) you cannot use a compressor with an HVLP. And HVLP would not be a good choice for this big a project. An airless would be a better choice, and I disagree about the overspray, as it can be controlled to the point that there is a very minimal amount. Look into renting an airless, then read up on tip sizes, what usually comes with a rental is an .017 which is a big tip. This size tip will give you the overspray mentioned before.
 

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OK first to the best of my knowledge (quite limited) you cannot use a compressor with an HVLP. And HVLP would not be a good choice for this big a project. An airless would be a better choice, and I disagree about the overspray, as it can be controlled to the point that there is a very minimal amount. Look into renting an airless, then read up on tip sizes, what usually comes with a rental is an .017 which is a big tip. This size tip will give you the overspray mentioned before.
The guns used for automobiles are HVLP and do use a compressor. Those guns run/need around 40psi at the gun. A HVLP used with a turbine compressor which only puts out around 10psi or more, the less stages the less the pressure. I've tried regulating a HVLP/turbine gun with a mini regulator but there was too much loss but I can you use that mini regulator with a normal compressor. Dropping the pressure while still getting a good finish reduces the overspray more.

You get less overspray and/or higher transfer rate with HVLP. Fine finish tips used with airless produce less overspray. The larger the airless tip the faster you have to move with it and more likely to get sags/runs.

I follow one guy on YouTube who sprays the walls in an average size room in under three minutes.
 

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I like the HVLP finish but to do the really great job they get expensive I think a 4 stage is as low as I would go. There is not much that will compare with them for clear finishes.

I have posted this before but I bought a cheap one from Graco, think along the lines of a Paint Zoom. My thoughts were that it would good for when you had like just a couple doors to do. It turned into a disaster you had to thin the paint way too much then the warm air from the turbine dried it too fast and it looked streaked.

I really like the airless with the FF tips between them and the pressure control on the unit overspray can pretty much be controlled. If someone has never used one I would suggest getting a gallon of mismatched paint, usually about $5 and go to the appliance store and see if you can get some big pieces of cardboard, then practice before you start the room.

I like the videos from The Idaho Painter on Youtube.
 

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I like the HVLP finish but to do the really great job they get expensive I think a 4 stage is as low as I would go. There is not much that will compare with them for clear finishes.

I have posted this before but I bought a cheap one from Graco, think along the lines of a Paint Zoom. My thoughts were that it would good for when you had like just a couple doors to do. It turned into a disaster you had to thin the paint way too much then the warm air from the turbine dried it too fast and it looked streaked.

I really like the airless with the FF tips between them and the pressure control on the unit overspray can pretty much be controlled. If someone has never used one I would suggest getting a gallon of mismatched paint, usually about $5 and go to the appliance store and see if you can get some big pieces of cardboard, then practice before you start the room.

I like the videos from The Idaho Painter on Youtube.
Didn't know that Graco made a cheap HVLP. I looked at their HVLP turbines but got a Fuji 4-stage with a Gxpc gun instead. They have a 5-stage now.

I do have a Graco Truecoat Pro II airless handheld with modified tip guards so I can use any standard or fine finish tips.

It was the Idaho Painter that I was referring to!
 

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Compressors are configured with capacity and storage. Capacity is related to the motor hp and size of the compressor. Storage is related to tank size. Manufacturers do a decent job of matching tank and compressor and you have many to choose from and price generally follows size. Today, many inexpensive off brand compressors, tools and accessories are available and likely fine for occasional use, but I wouldn't want my paycheck dependent upon them.

Sprayers and tools will be labeled with minimum psi and cfm requirements and the same capacity specs are on all compressors. Buying a compressor that's too small for your tools will result in buying a bigger compressor.

About a decade ago I bought a 1/2 hp 1 gallon Craftsman compressor as a package with a brad nailer, about as small as you get. It gets me by. I used it with my buddy's framing nailer to stud out our 1,000 sq ft basement, but had to wait for the tank to fill after a four or five shots. When filling our SUV's tires, the tank empties in a heartbeat and then I wait for the running compressor to finish the job. This little guy is perfect for my road bicycle tires, but won't do for sprayers and tools that require a continuous supply of air. I'll cry when it dies.

For blowing out sprinkler lines, I suspect storage capacity is more important so that you get a large mass of air at one shot verses a steady flow. For that, my little guy would do if coupled to a storage tank. How big a tank, I don't know.

Wagnor makes a line of airless sprayers that I suspect will cost near same or less than a decent spay gun and save you the expense of a compressor. I had one, but after painting four of my next door neighbors cars due to wind drift, tossed it.

For one garage, I suggest an extendable paint stick with better quality roller head, 5 gallon bucket, Metal Paint Grid, 3/8" or 1/2" nap roller and top quality paint. I painted that 1,000 sq. ft. basement with 9-1/2 ft walls and full length soffits in two days from bare drywall. The paint stick lets you put both hands to work and reach the ceiling and paint bucket without ladders or bending down. Top quality paint covers in two coats, drips less, lays up great and lasts forever. I suggest spending more on paint than tools since after the job is done, only the paint is left.

Several years ago we paid a contractor to paint over the builder's standard white. They used paint sticks long enough to reach the ceiling of our two story entry. A coworker's in-law painted for a developer. As standard practice, he sprayed and back rolled with paint sticks because the sprayer left too smooth a surface.

Hmmmm . . . Since I already have my little guy, I wonder if I could pump the SUV's tire to max rating and use it as a tank to blow out the sprinklers.
 

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A HVLP turbine unit has no storage tank. When you release the gun trigger a relief valve dumps the pressure.

Depends what you consider a decent spray gun. Those Wagner HVLP units aren't very expensive and you can spend hundreds on a spray gun alone. A compressor type gravity HVLP gun can be bought at Harbor Freight for $16.
 

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The cheap Graco was at Lowes for $150 came with the little cup you fill with paint and time how long it takes to run out of the cup then thin till it comes within limit. Doesn't work well with latex. That Fuji is a sweet unit. Have you tried the 5 stage?
 

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The cheap Graco was at Lowes for $150 came with the little cup you fill with paint and time how long it takes to run out of the cup then thin till it comes within limit. Doesn't work well with latex. That Fuji is a sweet unit. Have you tried the 5 stage?
No as I just got the 4-stage Fuji this past summer. The 5-stage gives you 10psi compared to the 4-stage which is 9.5psi by specs. They added a variable speed adjustment to regulate the pressure, better than the dinky volume control used on a whip hose at the gun. It did give me the idea to use one of those motor speed controls used for drills, routers, etc. It works but I haven't tried it while spraying.
 

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I have both airless and commercial HVLP equipment. The airless is also a commercial unit. I would use the airless to spray walls or anything I am trying to cover a large area. The airless delivers much more paint quicker than an HVLP gun. After masking off whatever I don't want to paint in a 24' X 24' garage, I can paint the walls and ceilings with my airless in about ten minutes. HVLP gun would take much longer. I use it for spraying woodwork, where I want a much finer finish and more control. That being said, if I were to paint my garage interior tomorrow, I would just do it with a roller, extension handle and cut in the corners with a brush on an extension handle. Not worth the time and effort of masking and cleaning the machine.
Mike Hawkins
 

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I've stated this a few times on here. Any Wagner Paint sprayer is a one-time use throw-away unit. It will get you through ONE job, maybe even a couple, but, they fail miserably on a short-term basis. The parts are cheap, the units are hard to clean, it's just frustrating to expect more out of them then a one-time use. I'd say if you find one at a deep discount, buy it, but, if it were me, I'd be renting a Titan or a Graco at my local paintstore or my local rental store.
 
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