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Old 01-08-2016, 04:52 PM   #1
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What does 1/2 on LP tank gauge mean

As I understand it m 28 gal lp tank can only be filled to 80% (22.4 gal.).

So when the gauge on the tank reads 1/2 is that 1/2 of 22.4 or 1/2 of 28?

I know the guage is approximate.

Just tryng to get a handle on evaluating what the guage is telling me at various levels.

Thanks
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Old 01-08-2016, 04:56 PM   #2
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Somewhat less than full, they are very inaccurate. Have it refilled and see how much it takes. After years of use you will get some idea what you have!
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Old 01-08-2016, 04:56 PM   #3
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Quote:
Originally Posted by chiliman View Post
As I understand it m 28 gal lp tank can only be filled to 80% (22.4 gal.).

So when the gauge on the tank reads 1/2 is that 1/2 of 22.4 or 1/2 of 28?

I know the guage is approximate.

Just tryng to get a handle on evaluating what the guage is telling me at various levels.

Thanks
1/2 of 22.4 is how I have ours setup. I can adjust a pod, and set to when full at 80%.
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Old 01-08-2016, 05:16 PM   #4
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The gauge on the tank reads 3/4 when the tank is filled (ie 80%). The electronic lights, four leds show full on the panel inside.
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Old 01-08-2016, 06:19 PM   #5
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My remote LP gauge shows "Full" when the tank is full of propane, i.e. at the 80% level. The 80% refers to gas capacity vs water capacity - the tank holds less propane than it would if it was water.

The actual gauge on the tank, if you have one, probably has both water and LP scales on it, with "full" for propane at the 80% (for water) level.
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Old 01-09-2016, 08:12 AM   #6
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The 80% fill is for expansion if the tank or compartment is exposed to heat such as direct sunlight. If the tank was filled to 100% in the evening while it was cool the propane would expand in the heat of the day possibly letting some gas escape through the pressure relief valve. You want to prevent this.
My large LP tanks next to my house also have the "Fill only to 80%" warning label on them.
I have my MH tank filled where I buy my home propane. The last fill up before I put the MH in storage cost me $1.99 per gallon. I seldom let my tank get below 1/2 full if at all possible.
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Old 01-09-2016, 08:29 AM   #7
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I stopped at a U-Haul dealer to get propane,the guy was trying to hook up the hose and couldn't get,i looked at it and told him it was the wrong size and ask him if he had an adaptor,he found one,all good now,he turns on the pump and starts pumping,after awhile he looks at me and says how do I know when this is full,i just told him that will be enough,stop there.Cant believe they would let someone do that,that knows nothing about it.
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Old 01-09-2016, 07:04 PM   #8
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That is why I am hesitant to let just anyplace refill my propane tank.
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Old 01-09-2016, 07:19 PM   #9
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When filling frame mounted cylinders, at 80% it will shut the propane flow down, per the 80% Stop-Fill Valve. And some years ago, portable tanks also have them.
http://www.phmsa.dot.gov/portal/site...gnextfmt=print
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Old 01-09-2016, 10:07 PM   #10
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If you are an optimist it means the tank is half full....if you are a pessimist it means the tank is half empty....
Sorry, just couldn't resist...lol Happy New Year everyone....
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Old 01-09-2016, 10:19 PM   #11
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My built-in tank shows 3/4 when full. So when that gauge shows 1/2, that means I have used 1/3 of capacity. When gauge shows 1/4, I have 1/3 of tank capacity left. Does that make sense?

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Old 01-09-2016, 11:36 PM   #12
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my tank will shut off when the fill reaches at 3/4, meaning 75% of total volume. when the needle is at 1/2, it indicates 50% of the total volume. back to your question, 1/2 is 50% of 28 gal, ie. 14 gal.
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Old 01-10-2016, 12:45 AM   #13
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Quote:
Originally Posted by chiliman View Post

Just tryng to get a handle on evaluating what the guage is telling me at various levels.

Thanks
I took a Sharpie marker and marked the gauge face where the needle is. Then after filling wrote the number of gallons on the tank beside the mark. Having 3 such reference marks at different levels, they give me at a glance of the tank gauge, approx how much propane I have used.
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Old 01-10-2016, 06:48 AM   #14
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It means there is somewhere between 1/4 to 3/4 of a tank . They are as accurate as gas gauges in a car. Which is not accurate at all!
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