Hey Mark,
On-board LP tanks typically have a POL connection so you can install the GasStop Emergency Propane Shut-Off Valve Gauge - POL Connection # GS84FR between the regulator and tank. This has a gauge so you can get an idea of how much propane you have as well as an automatic shut off feature in the event of a leak. If you press down on the gauge 4-6 times the gauge should give you a fairly accurate reading of the tank so that you can be mindful of when you need a refill. view full answer...
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