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Howdy Dakka,

I am turning to you in perhaps my third attempt at fixing a problem here.

I own a Grex airbrush and compressor. The compressor has no storage tank and has the moisture tap.I use the compressor it at 60 PSI.

Now the problem I am having is my airbrush sputters. It is similar to having a machine gun. It does this when I use pure water. With painting, it varies on what it does. Sometimes it is a smooth operator, other times it is useless.

General Internet/google-fu left me with clean the brush. I have cleaned it thoroughly with pipe cleaners of all shapes and sizes with cleaner, and even run it through a jewelry cleaner. Still the sputtering persists.

I am cleaning it for a 4th time, but I am left clueless as to fix my issue.

For those who want to help and need the full deal here is what I own. http://www.grexusa.com/grexairbrush/products.php5?id=GCK04

I will see if swapping brushes/nozzles helps next as I got a .2mm nozzle for Xmas.

If you have water in the cup and just press down for air... is there any back bubbling in the cup?

 granander wrote:
If you have water in the cup and just press down for air... is there any back bubbling in the cup?

EDIT: Yes.

I was a derp when I made this post originally.

I have recently had this problem and solved is yesterday.

What happened was that my nozzle had a small small leak pushing air back into the cup through the leak. In my case I just had to fasten the part holding the nozzle in place thus tightening the seal and making the leak go away.

Now I don't have a grex but that might be a place to look. The problem could be both that its not tight enough or there might be a small piece of dried paint on the seal.

 granander wrote:
I have recently had this problem and solved is yesterday.

What happened was that my nozzle had a small small leak pushing air back into the cup through the leak. In my case I just had to fasten the part holding the nozzle in place thus tightening the seal and making the leak go away.

Now I don't have a grex but that might be a place to look. The problem could be both that its not tight enough or there might be a small piece of dried paint on the seal.

This was the exact problem. Seems brand aside parts still do their things. I fixed it with a small extra tug with a wrench and all the bubbles went away. Other patchwork includes using a wax or chap stick for those that tightness does not seem to help.

Great to hear that my missfortune could make some good for others.

 granander wrote:
Great to hear that my missfortune could make some good for others.

It is what the internet is for, solving other peoples problems by us experiencing it first.