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How to tell when a 30lb drum is near empty?

atikovi on Fri July 27, 2012 11:58 AM User is offline

I have a drum of 134 that weighs 9 pounds. The label doesn't say what the container itself weighs, just the net weight of the freon was 30 pounds when full. I can shake it and feel the liquid sloshing around but how much more can I get out of it. At some point the system pressure will equal the pressure in the drum and no more will flow out. How much is usually left when that happens? And how much does an empty drum weigh? I don't want to be in the middle of a recharge and have to run out for a new drum.

Gerald K4NHN on Fri July 27, 2012 1:07 PM User is offlineView users profile

Hi, I'm just a DIY guy and the empty jugs that I've weighed were between 5.5 and 7.5 pounds. I think you may have 2 pounds at the very best still in your jug...

emsvitil on Fri July 27, 2012 4:24 PM User is offlineView users profile

My empty 30lb R12 can is 5.010 lbs.

I think they use the same cans........

-------------------------
Ed
SoCal

Leggie on Fri July 27, 2012 10:45 PM User is offline

At the point it will no longer "flow out" the container holds about 3/4 lb.
To use the last bit, recover into your recovery machine, then charge from the recovery cylinder or save for the initial charge into a freshly vacuumed system.

New 134a weighs 35-36 gross.

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