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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...

07-10-2017, 08:34 AM	#2
Hillcountry Senior Member Join Date: Apr 2016 Location: In the hills Posts: 2,356 Thanks: 1,602 Thanked 765 Times in 459 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...