20 # Bottle

Hillcountry · 07-10-2017, 08:34 AM

I believe it's general practice to fill propane tanks (large and small) to about 80% capacity. Not sure if this is for safety or that it's a law but my twin 250 gallon tanks are never filled more than 75-80%.
As for the 20 lb. grill tanks, I always have a full one on hand as a backup in case I run out while grilling...never cared about how much propane was inside...

joey2665 · 07-10-2017, 08:38 AM

Quote:

Originally Posted by Hillcountry

I believe it's general practice to fill propane tanks (large and small) to about 80% capacity. Not sure if this is for safety or that it's a law but my twin 250 gallon tanks are never filled more than 75-80%.
As for the 20 lb. grill tanks, I always have a full one on hand as a backup in case I run out while grilling...never cared about how much propane was inside...

You are correct the 75-80% allows for the expansion and contraction of the propane with changing temperatures.

DickR · 07-10-2017, 10:57 AM

When you think about it, you don't want the liquid level too close to the outlet. You want vapor going out the pipe to the grill, not a slug of liquid, which would provide a sudden surge of fuel to the grill, maybe blowing flame all over your face!

TheProfessor · 07-10-2017, 12:35 PM

Understand the point of the post is about weights and mathematics.

The place I go to uses both a scale and a unit counter. Gallons I think.

The screw I think is to let excess air out. But let other chime in on that.

Me, I have an extra full tank. So don't have to worry if grille tank runs out while cooking.

RUGMAN · 07-10-2017, 05:27 PM

seems like when we swap one out at cumberland (blue rhino), there is even less propane in them than when I get the tanks filled back home.

thinkxingu · 07-10-2017, 06:05 PM

Quote:

Originally Posted by RUGMAN

seems like when we swap one out at cumberland (blue rhino), there is even less propane in them than when I get the tanks filled back home.

Yup, Blue Rhino only fills it 75% or so to be "extra safe."

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NoBozo · 07-10-2017, 06:07 PM

Quote:

Originally Posted by TheProfessor

The screw I think is to let excess air out. But let other chime in on that.

Me, I have an extra full tank. So don't have to worry if grille tank runs out while cooking.

I think you are correct about bleeding off AIR at the top of the bottle. We always keep a spare bottle. I guess using my bathroom scale to weigh the bottle is a bit Anal...that's me..

NB

PS: NEVER lay the bottle on it's side..Always keep it VERTICAL while transporting the bottle in your car.

07-10-2017, 08:34 AM	#1
Hillcountry Senior Member Join Date: Apr 2016 Location: In the hills Posts: 2,420 Thanks: 1,677 Thanked 786 Times in 466 Posts	I believe it's general practice to fill propane tanks (large and small) to about 80% capacity. Not sure if this is for safety or that it's a law but my twin 250 gallon tanks are never filled more than 75-80%. As for the 20 lb. grill tanks, I always have a full one on hand as a backup in case I run out while grilling...never cared about how much propane was inside...

07-10-2017, 10:57 AM	#3
DickR Senior Member Join Date: Apr 2008 Location: Moultonborough Posts: 758 Thanks: 4 Thanked 260 Times in 172 Posts	When you think about it, you don't want the liquid level too close to the outlet. You want vapor going out the pipe to the grill, not a slug of liquid, which would provide a sudden surge of fuel to the grill, maybe blowing flame all over your face!

07-10-2017, 12:35 PM	#4
TheProfessor Senior Member Join Date: Nov 2010 Posts: 1,150 Thanks: 17 Thanked 354 Times in 213 Posts	Understand the point of the post is about weights and mathematics. The place I go to uses both a scale and a unit counter. Gallons I think. The screw I think is to let excess air out. But let other chime in on that. Me, I have an extra full tank. So don't have to worry if grille tank runs out while cooking.

07-10-2017, 05:27 PM	#5
RUGMAN Senior Member Join Date: Jul 2015 Location: weirs beach, Posts: 309 Thanks: 39 Thanked 42 Times in 34 Posts	seems like when we swap one out at cumberland (blue rhino), there is even less propane in them than when I get the tanks filled back home.