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Old 10-15-2009, 09:46 PM   #21
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This is not a scam. Ok, maybe a little bit of a scam. Propane tanks can only be filled to 80% capacity. This means that a 20# tank can legally only accommodate 16# of fuel. All current portable propane tanks must have an Overflow Protection Device (OPD) installed, and the OPD prevents the tank from being filled to more than 80% capacity.

Does this mean that the exchange places put 15-16# in a 20# tank? I don't know. It would make sense to decrease the volume in order to keep the posted price the same when the cost went up. It would be more expensive for YOU if they have to reprice everything every time the price of propane changed...

Certainly the best way is to find a place that refills YOUR tank and charges for the amount filled. Assuming they charge a reasonable price for it...

Dunno, but mine will all hold a full 20 lbs and they are all equipped with the OPD valves. I still think it's a scam.
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Old 10-15-2009, 10:32 PM   #22
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Just called...$14.95 to fill my tank. The gas station across the street from the filling station was charging my $24 for an exchange! Damn glad I got involved in this thread...

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Old 10-15-2009, 10:40 PM   #23
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First: My understanding of the OPD device is that it prevents any tank so equipped from being charged with more than the maximum amount of propane......so if the tank's OPD is functioning properly, it should be impossible to overfill it.

I fill at a local Sunbelt Rentals. They fill the 20# cylinder for $12, which is a bargain in our area. Their fill is simply to set the scale at 2X the tare weight stamped on the handle, and cut it off there. That's sensible and very reasonable.

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Old 10-15-2009, 11:47 PM   #24
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There is another stamp on the cylinder marked W.C followed by a number. For example one of mine has W.C 47.6 stamped on it. This is the water capacity of the cylinder in lbs. You can easily do the math to convert this to lbs of propane or you can use this chart that I found on one of the propane sites:



So, for the W.C 47.6 it says the tank will hold very nearly 20 lbs of propane. W.C. 47.8 would be 20 lbs according to this chart. That would be like a 0.4% difference and I suppose that's due to tolerance variations during manufacturing. The W.C. capacity is the allowable capacity for that particular tank. Blue Rhino might install some type of device to reduce the capacity and I would not be surprised if that were the case.

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Old 10-15-2009, 11:48 PM   #25
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Originally Posted by SOB View Post
Just called...$14.95 to fill my tank. The gas station across the street from the filling station was charging my $24 for an exchange! Damn glad I got involved in this thread...
Good for you! That's a considerable savings for sure.
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Old 10-16-2009, 12:17 AM   #26
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Quote:
Originally Posted by DNW View Post
This is not a scam. Ok, maybe a little bit of a scam. Propane tanks can only be filled to 80% capacity. This means that a 20# tank can legally only accommodate 16# of fuel. All current portable propane tanks must have an Overflow Protection Device (OPD) installed, and the OPD prevents the tank from being filled to more than 80% capacity.

Does this mean that the exchange places put 15-16# in a 20# tank? I don't know. It would make sense to decrease the volume in order to keep the posted price the same when the cost went up. It would be more expensive for YOU if they have to reprice everything every time the price of propane changed...

Certainly the best way is to find a place that refills YOUR tank and charges for the amount filled. Assuming they charge a reasonable price for it...
This is bad information a 20# tank holds 20# of propane at 80% I have my tanks filled at costco and always get 20# of propane
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Old 10-16-2009, 02:50 PM   #27
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This is bad information a 20# tank holds 20# of propane at 80% I have my tanks filled at costco and always get 20# of propane
+1 This has been my experience too. The exchange thing is a scam and a blatant one at that.
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