Air compressor outlet

Bkpigs

Member
I am thinking of extending my moisture drain from the air tank to get closer to the drain in my shop floor. I also want to add an air outlet to the same area. Would there be a problem with using the same pipe but just putting a two foot drop below the air outlet for the moisture drain? I understand there will be moisture running down the line to the down leg, but the air will be cooler and therefore holding less water than the hot air from the upper outlet. What are you opinions? Also, why do they put the outlet from the air tank so high that it gets the hot moisture ladened air into the line?
 
If you google air line plumbing technique or something of that order they show moisture drain drops at different points in the system,when we did our shop years
ago there were schematics on how to do it that I used. Most of the moisture traps were at the end of runs and had a ball valve to drain water every so often. The
outlet on the tank is higher for the same reason,to attempt to keep moisture out of the line,if you're going to spray you need to have a regulator with a filter
in that designated line to trap the moisture that is generated during spraying that doesn't get time to settle.
 
You are going get moisture every time air is compressed that is why drains are placed in bottom of tank and all low places in air line.You can't change physics periodic draining is nesscessary.Scott
 
The longer you run a pipe from the compressor before you put a valve on it will help keep water out of the compressor tank. The plumbing will fill first.
 
My air comes out halfway up the tank, I have a truck air drain in the bottom so i just yank the cable. still had some water even
after filter and water trap. So I put a coil of 1/2 in copper line where it comes out of the tank problem went away.
 
I guess I should have added that my compressor is on a shelf about 8 foot above the floor. I think I may just plug the higher outlet and plumb everything from the bottom outlet. Obviously, keeping the slope towards the moisture drain and having that lower than everything else. Thanks.
 
At the shop in St Louis, there was so much condensation in
the air lines that the guys used to tease that there was air in the water lines
 
The way the tank gets water out is the cooler tank walls condense the water vapor out of the air, (at least some of it). The then liquid water drains down the walls to the bottom. waiting to be drained.

If you pull air off the bottom, it will defeat the purpose of the tank as far as removing water. The lines will be filled with water every time you call for air.
 

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