Quote:
Originally Posted by mpchiar
If pressure gauges don't work why are gauges installed on permanently installed tanks on motor homes? As the liquid level is reduced the cubic area in the tank increases thus allowing the pressure of the gas to reduce thus indicating that the liquid volume is less.
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The propane in the tank is always at the boiling point inside the tank. As the liquid level goes down more propane boils off to maintain a constant pressure. Therefor, the pressure gage won't show low level until almost all of the liquid propane has boiled off leaving only gas which decreases in pressure very quickly.That's why when it shows low, you better change tanks right away.
Permanently installed tanks dont have pressure type level indicators, they have an actual float that measures liquid level.
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