air compressor rusting from the inside out! [Archive] - FSB Forums

: air compressor rusting from the inside out!


pfun41
12-15-2010, 03:07 AM
so the compressor i use is a 33 gallon 150 psi craftsman oilless direct drive unit. it is located in our garage which is fully enclosed. today i drained it for the first time in like 3-6 months. i got about 1.5 soup cans full of brown/rusty water. its gotta be the humidity. my main concern is the fact that its rusting. is there anything i can do to stop the rust. i was thinking something like wd40 inside or something.

Eastwood Company
12-15-2010, 08:31 AM
so the compressor i use is a 33 gallon 150 psi craftsman oilless direct drive unit. it is located in our garage which is fully enclosed. today i drained it for the first time in like 3-6 months. i got about 1.5 soup cans full of brown/rusty water. its gotta be the humidity. my main concern is the fact that its rusting. is there anything i can do to stop the rust. i was thinking something like wd40 inside or something.

An idea that might work is to use a gas tank sealer kit. Most kits come with multiple chemicals to slosh around in the tank and clean the rust off and etch the metal. The sealer then covers the inside surface and keeps the rust from coming back. If it works in a gas tank, I could bet it would work in a air tank.

I haven't tried this personally, but it's a thought!

Our gas tank sealer kit is found here: http://www.eastwood.com/gas-tank-sealer-kits.html

Hope that helps!

-Matt/EW

Robs79BBbronco
12-15-2010, 09:18 AM
drain your compressor at least once a week.more often if it gets used everyday.....yes, it's worse if you live in a high humidity area, and no there is nothing you can do about it except drain it.

pfun41
12-15-2010, 05:09 PM
drain your compressor at least once a week.more often if it gets used everyday.....yes, it's worse if you live in a high humidity area, and no there is nothing you can do about it except drain it.

i really wish these compressors had the drain valve closer to the front. its a pita to drain it. i also wish i had a screw type one. itd be nice to hear myself think.

broodu
12-15-2010, 07:15 PM
i drain mine every time i use it and i dont have your humidity i rarely get water out of mine. doesnt really help with your situation but just sayin.

JohnMcD348
12-15-2010, 08:50 PM
I saw a thing over on GarageJournal.com I think where a guy built an off set bleeder by fitting a 90* piece and a length of pipe onto a ball valve. I have a similar problem but I always drain my tank after I use it. I still get a little brown water when I do it.

Hefty
12-15-2010, 09:01 PM
I drain mine about once a week. The rust thing is normal. The compressor will create condensation even in the driest climates. With our 80 gallon we get a cup of water out of it every week....but it runs all the time.

liltimmy08
12-16-2010, 01:51 AM
Ive got the same POS compressor. Go to home depot and get a simple check valve, 90* piece, etc. Took about a minute to remove the factory drain and install the new one.

rhauf
12-16-2010, 01:53 AM
put oil in the tank. that helps stop it from rusting.

Rockford514
12-16-2010, 01:14 PM
I got tired of crawling under mine

http://i265.photobucket.com/albums/ii212/Rockford514/TECH/002-15.jpg

I drain it daily

1995f1504x4
12-17-2010, 11:54 PM
wait for it to rust through and JB weld it!! haha

do not do that. bad idea. i'd say just drain it everytime you use it as broodu said.

Fireguy50
12-23-2010, 11:30 PM
I got tired of crawling under mine
http://i265.photobucket.com/albums/ii212/Rockford514/TECH/002-15.jpg
Thatís great! :thumbup

I have an automatic drain. It has a ball float inside and once the water gets up high enough it lets it out.

Rockford514
12-24-2010, 06:33 AM
"automatic drain" That sounds COOL. I may look in to those

ToughBronco
12-24-2010, 12:01 PM
I got tired of crawling under mine

http://i265.photobucket.com/albums/ii212/Rockford514/TECH/002-15.jpg

I drain it daily

yup, thats how a lot of commerical air compressors are.

waltman
12-24-2010, 03:54 PM
I drain mine every day or two.

pfun41
12-24-2010, 04:42 PM
"automatic drain" That sounds COOL. I may look in to those

i found this:
http://www.paragoncode.com/shop/compressor/

thats pretty cool. too bad mines a portable unit and theres not enough space. i actually had the crap drain break the other day. i couldnt find what i wanted ( a short brass elbow and valve) to put in its place so i just stuck a 1/4 plug in it for now. i really like the auto drain thing. when you guys drain your tanks do you empty the whole ting of air and then drain it or just open the valve until moisture stops coming out while theres still pressure?

i might just get something like this:
http://www.hotboatpics.com/pics/data/500/3589drainvalve.jpg
i want to be able to hook a peice of tubing to the drain so i dont have water sitting on the floor. although i guess if i just open it for a sec or 2 after i use it there wont be any liquid huh?

Rockford514
12-24-2010, 06:30 PM
I barely crack mine open,then close after the water stops

waltman
12-24-2010, 10:44 PM
Just drain it until the water stops coming out and another 20 seconds or so will be enough. If I'm getting a lot of moisture in the tank, I will even do it several times in one day, especially when I'm getting closer to painting.

TheUnforgiven
12-25-2010, 03:53 AM
wow, this is going to make me go and check the drain on my uncles compressor. which he has had for 10 years and never drained, yet he is the most anal-retentive guy i know.

Fireguy50
12-27-2010, 05:13 AM
"automatic drain" That sounds COOL. I may look in to those
cost around $45, it has an 1/8in output to plumb the water outside
http://www.fordfuelinjection.com/public/5002K1.png

j. r. Nice
01-05-2011, 09:08 PM
If I am using mine a lot, I crack the drain and leave it open to weep the moisture. Compressor runs a little more to make up for the "leak". I shut it off at nite and let it bleed off.

Oil in the tank would not be a good idea if you ever plan on spray painting using that tank.

rocknrod
01-05-2011, 11:09 PM
I put a 90 on the bottom of mine etc. As was shown on the blue unit above. Have never seen rust (yet).