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Old 11-13-2014, 04:33 PM
OLDSAM OLDSAM is offline
Join Date: Feb 2008
Location: Tucker GA
Posts: 190

After filling the tank with water, use a low volume, high pressure pump. Manual test pump is easiest, with a small piston and a long handle. Don't have to add much water.
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Old 11-13-2014, 04:35 PM
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PeteP PeteP is offline
Join Date: Jun 2011
Location: Chesapeake, VA
Posts: 219
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I saw a SCUBA tank rupture with about 2300 PSI in it. Went completly thru the roof of the dive shop to points unknown. I used to set and wait for my tank refill, after that I come back and pick it up.

BTW.. drain my vertical 30 Gal compressor every night. Old USAF habits die hard!
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Old 11-13-2014, 05:32 PM
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Marc DeGirolamo Marc DeGirolamo is offline
Join Date: Jan 2005
Location: Saskatoon,Saskatchewan,Canada
Posts: 291
Default rust kills them

Drain the tank regularly, and even doing that will not guarantee that it will not do this. Usually it will start leaking first and at least give some warning. glad no one was injured..
Marc DeGirolamo
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Old 11-13-2014, 05:55 PM
humptybump humptybump is offline
Join Date: Feb 2011
Location: USA
Posts: 3,180

Originally Posted by DaleB View Post
Regarding tank drains... for you guys with vertical tanks, are your drains dead center in the bottom of the tank or off to one side?
This has been an interesting thread. My compressor tank is under pressure full time. Tank pressure us set to 175 psi and output is set to 100 psi and another drop down in the paint room.

It's a old vertical tank. While the drain is on the side, it has an interval weighted "snake" that drops to the bottom of the tank.

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Old 11-13-2014, 07:35 PM
BillL BillL is offline
Join Date: Sep 2007
Location: Central IL
Posts: 5,745

Originally Posted by az_gila View Post
How do you easily get 150 psi water at home?
You can put a 1/2 pipe standing out the top and use a hand pumped grease gun with a zerk fitting. The grease will float and be the first thing out the top when done. Easily controllable too.

Lord Kelvin:
I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.

Last edited by BillL : 11-14-2014 at 07:11 AM.
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Old 11-13-2014, 08:16 PM
PJSeipel PJSeipel is offline
Join Date: Jan 2005
Location: Albany, GA for the moment
Posts: 294

I have a vertical tank with a valve on the bottom. I replaced the valve with a brass elbow and a length of nylon tubing (rated to 250 psi) and another valve at the end of the tubing. That way, any condensation that forms in the tank drains into the tubing sitting under the tank. I can then use the valve on the end of the tubing to release any stored water. I drain it about once a week.

I had the Harbor Freight automatic drain for a while before I replaced it with the tubing and found that it tended to get stuck in the open position quite often.

PJ Seipel
RV-10 #40032
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Old 11-13-2014, 09:07 PM
waterboy2110 waterboy2110 is offline
Join Date: Jul 2010
Location: SF Bay Area
Posts: 247

Originally Posted by N15JB View Post
I wonder how many of us drain our tanks on a regular basis. I have known forever that I should, but rarely did. After having one tank rust through(while unpressurized) I finally put a HF auto-drain on each of my compressors. It is surprising how much water blows out after even short term use.
Drain mine every session. Lot's of red **** all over the rag I keep under the drain.
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