arcscarpa

First off, Thanks to everyone who responded to my posts about compressors. I decided to go with the DeVelbiss. I checked it out before buying and all seemed to be working well, except one thing. When the guy was showing me it's working shape I noticed a slight hissing sound and found it to be coming from the drain valve. I gave it a turn and the hiss stopped. Later I went to drain the unit and the valve would not budge. Now it looks as though I need to replace this valve. I have found the part on line, but does anyone have any experience doing this, any suggestions? I noticed on a much smaller compressor I have that the valve appears to be two parts; the threaded stem and the larger nut.
Thanks again.

Kenbo

Is there any pressure in the tank? I usually release the pressure from the tank and then open the drain valve. I don't know if this is the way other guys do it but it just makes sense to me. Give it a try.
Ken

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GeorgeC

I like to open the valve with pressure in the tank so that the out flowing air will help scavange the tank.

g

arcscarpa

When I first tried opening the valve there was little to no pressure, then I release all pressure from the tank.

dbhost

Used compressor I am guessing...

Sounds like rust built up in the threads of the valve. I am assuming this one is a simple petcock type valve... You might try disassembling the valve assembly, soaking in penetrating oil, cleaning the threads really well, replacing any seals / o-rings etc... And using a light coat of oil for reassembly I think you should be fine...

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-- Trying to follow the example of the master...