Air in LP gas line.

I've been using the burners also, I was hoping that someone had a better idea.

Thanks for the replies.

I make sure the unit is well vented and turn all the stove burners on until I'm sure there is raw gas and turn them off. I let the gas dissipate and then light a burner.

Just the nature of the beast.

I do stove burners first, then water heater for a couple of minutes, then propane furnace.....by then, the fridge takes care of itself.

Thankfully I have electronic igniters on everything.....but I use a "grill lighter" for the burners.

Yes, just one at a time with gas still flowing from the 2nd tank. Fill one, reinstall it, turn it on, switch to that tank, then fill the other one. The most annoying thing is the refrigerator as the propane seems to only move about half an inch with each attempted relight ;-) But my refrig is 18 years old, so maybe it's easier nowadays.

I have 8 foot rubber propane lines from the tanks to the regulator and when I change tanks, I really don't have any problems and if I do I just use a stove burner for a few minutes.

Do not disconnect tanks any longer than needed, And do one tank at a time, not both. I grew up with propane. We had like 5 100 pounders outside our kitchen window.. (might have been six) these provided hot water and kitchen stove.. NEVER did we have to re-light the water heater,, NOT once. Later we used Propane to heat other buildings, plus there was a 2nd house that used propane for cooking and hot water. Never had to relight a pilot due to air in the line. Never. Not in the roughly 20 years we lived there.. Oh we did have to relight from time to time, but that was when we accidently ran COMPLETLY out of gas and had to haul a bottle to a refill station till the delivery man came by with new tanks.. (He was an "On Call" Service, nto a "Same day every month" service).

Finally I will add that pilots are hard to re-light, this is on purpose. It is a safety issue. You have to hold the override button, while lighting the pilot, then continue to hold it for a good minute in most cases. sometimes longer. On some of the pilots I deal with even today (oven) that may not be enough.. Takes time for the pilot to heat the thermocouple so it generates enough CURRENT (not voltage) to get the magnet to hold the valve open.

After picking up the trailer at the storage yard I'll open the valve on the propane tank and light one of the burners on the stove top to purge the air from the LP line. Once one of the burners stays lit I'll turn it off and then light the pilot on the refrigerator. You'd think that between the valve on the tank and the control knob on the stove top that the system would hold gas and not let air in but it doesn't. I've come to accept that that is just the nature of the beast.

My only problem is with the refrigerator after the unit has been in storage. My refrigerator is near the furnace, so I first turn on the furnace. After it ignites, the refrigerator will work on gas.

You can't prevent it. Just light the burners on the stove first and let it flush out the propane lines. A minute or two of them burning is sufficient.

There are no check valves in there that I'm aware of . I purge the air thru the stovetop burners and once they light and burn for a minute everything seems to be ok. Can't imagine extra ball valves helping because there will be air between the valve and tank fitting when the tank is hooked back up