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Old January 8th, 2014, 08:06 AM   #1
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Default propane tank question

I heat my garage with a 100# cylinder. It is a flat rate of $70.00 to fill. So, my question is this...should I completely empty the tank before filling? It is never completely empty, but is that just propane left in the tank? Or is it moisture? Or the stuff they put in to make it smell like shit?
I'm asking because when I fill my nitrous bottle they weigh it, then charge for topping it off. But since this is a flat rate of $70, regardless of what's left, seems like it wouldn't hurt to empty it completely...am I wrong?
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Old January 8th, 2014, 08:10 AM   #2
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you're asking if we think it's better to pay twice for something or to just pay once?
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Old January 8th, 2014, 08:11 AM   #3
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Twice.
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Old January 8th, 2014, 08:11 AM   #4
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He's asking if completely emptying the tank will cause any sort of damage.
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Old January 8th, 2014, 08:12 AM   #5
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you're asking if we think it's better to pay twice for something or to just pay once?
You don't understand the question?
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Old January 8th, 2014, 08:13 AM   #6
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you're asking if we think it's better to pay twice for something or to just pay once?
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Old January 8th, 2014, 08:14 AM   #7
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He's asking if completely emptying the tank will have any benefit
Fixed
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Old January 8th, 2014, 08:16 AM   #8
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$70 for a 100# isn't terrible.

I would run 'er dry, or as low as you dare. I've never smelled anything different up at the cabin when we have ran tanks dry?
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Old January 8th, 2014, 08:18 AM   #9
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If there is a filter in line run it empty, if not don't.
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Old January 8th, 2014, 08:26 AM   #10
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Still not clear here...I run the tank until it will no longer operate my heater, due to lack of pressure. After the heater is unhooked, if you crack the valve there is still pressure from the remaining propane. That is the question...should I completely empty the remaining contents into the air to ensure my tank is completely full of fresh new propane? For the same price? Or doesn't it matter? Paging hank hill...
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Old January 8th, 2014, 08:28 AM   #11
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considering that I just paid $2.12 a gallon for a fill up my 500 gal tank............


Where do you go to get it @ .70?..........
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Old January 8th, 2014, 08:29 AM   #12
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considering that I just paid $2.12 a gallon for a fill up my 500 gal tank............


Where do you go to get it @ .70?..........
Caro rental, open 7 days
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Old January 8th, 2014, 08:58 AM   #13
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Still not clear here...I run the tank until it will no longer operate my heater, due to lack of pressure. After the heater is unhooked, if you crack the valve there is still pressure from the remaining propane. That is the question...should I completely empty the remaining contents into the air to ensure my tank is completely full of fresh new propane? For the same price? Or doesn't it matter? Paging hank hill...
No, propane doesn't go bad like gas so it's always "fresh". If it stops fueling the heater it is empty. There will still be residual liquid in the bottom.
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Old January 8th, 2014, 09:01 AM   #14
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Well in the case of my 500 gallon. It never goes below 30% and when the fill it it only is filled to 80% to allow for thermal expansion. So they never completely fill your tank and you don't need to completely empty it. Running it till the heater quits means its empty enough. Plus a 100lb is not a hundred gallons. So he is not paying .70 a gallon. Propane is 4.2lbs a gallon. So the max his tank can hold is about 25 gallons. So he's paying almost $3.00 a gallon.
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Old January 8th, 2014, 09:04 AM   #15
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considering that I just paid $2.12 a gallon for a fill up my 500 gal tank............


Where do you go to get it @ .70?..........

He is filling a 100# tank. Not a 100 gallon tank. He is only getting like 23 gallons at the most.
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Old January 8th, 2014, 09:06 AM   #16
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No, propane doesn't go bad like gas so it's always "fresh". If it stops fueling the heater it is empty. There will still be residual liquid in the bottom.
The 'residual liquid' was my concern, isn't it taking up space that could be used by propane?
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Old January 8th, 2014, 09:11 AM   #17
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The 'residual liquid' was my concern, isn't it taking up space that could be used by propane?
:Sonicjay:
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Old January 8th, 2014, 09:12 AM   #18
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:Sonicjay:
Must of been a dumb question...
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Old January 8th, 2014, 09:16 AM   #19
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I'm getting 200 gallons today for 2.04 a gallon. Own my own tank minimum fill.
This has nothing to do with thread!
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Old January 8th, 2014, 09:17 AM   #20
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Quote:
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Must of been a dumb question...
propane is a liquid.

as liquid propane absorbs heat it will flash into vapor (which also raises the pressure in your tank). the higher the temperature the higher the pressure in the tank. the vapor is what you burn in your heater. when there isnt enough liquid in the bottle (or heat to boil the liquid fast enough) to support the pressure required to run the heater your heater quits working.

the extra liquid in the bottom of your tank is liquid propane.
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