On Fri, 14 Apr 2017 14:26:43 -0400, Pat wrote:

On Fri, 14 Apr 2017 11:11:36 -0700, "Tony944"
wrote:



"dadiOH" wrote in message news

"Frank" "frank wrote in message
news
I just looked at one of my barbecue tanks and it says 15.0 lbs. Propane
weighs about 4 lb/gal so obviously my tank is short over a gallon. Some
places refill by the gallon but prefilled run short. Never got a reply on
this deception from state AG but rules may be different in different
states. Bet most consumers think they are getting 5 gal of propane in the
filled 5 gal tanks.

LPG tanks are filled to 80% of capacity.

Well I am kind confused the Propane is not actually Propane
it is mixture of Butane and Propane depend what part of country your in
however is been long time sense I dealt with, so I can only say that you
seems
to be very close. Tanks I dealt with at time was 12.5 lb. 5 Gl. jug, now is
????

Common BBQ tanks can hold 20 pounds, but are usually only filled to 15
or 16 pounds depending on the supplier. I have read that it is safer
that way and is required by regulations. I don't fully understand the
safety issue, but it has been that way for many years.
The total water capacity of a 20 lb propane tank is about 6.25
american gallons. Propane regulations stipulate the tank can only be
filled to 80% of total WC - which comes out to very close to 5 gallons
of "liquified petroleum gas" which weighs 20 lbs.

The "tare weight" of the tank has to be stamped on the tank by law so
the tank can be accurately filled by weight.

I used to have my propane licence and all this stuff was taught and
required knowledge to get the licence, so this is not my "opinion".
Also not what "i have read". It IS the law.