Replacing Propane Tank

Right now I have a rented 150 gal propane tank with a regulator on the tank. Rent is $50 per year.
I have gotten to the point where this tank is much to big since the only thing that I have left on propane is my kitchen stove/oven. The cook says the gas stove stays so I need to make a choice.

I really want to replace this rented tank and buy something a lot smaller. I am thinking of getting 2- 20 lb tanks and manifold them together. The problem or question I am having is the regulator.
From what I have been reading I need a regulator at the tank to reduce pressure of tank to line pressure then another regulator at the house to reduce pressure to appliance pressure.
BUT right now I only have 1 regulator at the tank and the regulator that is mounted in the stove????? ????

Can someone please explain to me how this regulator thing works so I can be better informed when I go to purchase the needed equipment.

Thanks.

Get a 100 size tank, then you have something. Will be cheaper than the plumbing & cost of the 2 small tanks anyhow.

--->Paul

Later a higher pressure regulator was used at the tank and a lower working pressure regulator was used just outside of the house/building, etc.

On very rare occasions a tank regulator would have its vent ice over and wind up delivering high pressure to the house. I have known of two instances where such pressure produced flames to the ceiling. Luckily in both instances people were at hand to promptly shut off the flow and thus stopping a house fire. Two regulators practically elimiminates this chance of fire.

I agree that 100 pound bottles would probably be your best option. Farm supply stores often sell them new. Some dealers correctly refuse to fill older bottles owned by another dealer or without an updated inspection.

I would also suggest that you speak to the dealer you will have fill such bottles and ask about getting an automatic switch over valve to supply the regulator. When one bottle runs out the device will automatically switch over to the full bottle. The empty bottle can even be removed for refilling without disrupting the flow. Campers typically have such a set up.

Another thing---I don't believe that low pressure regulators are set at .5 lbs. pressure. I believe they are correctly set at 13 or 13.5 inches of water column pressure.

Safety first as I also suggest you spring a few extra bucks for regulator covers to prevent icing.

So has this system been hooked up wrong all these years???
Has the rules changed recently that would have made this system legal then but not now???
Or do they have a 0.5 psi regulator at the tank??

Questions; questions; questions.

May have to go to another dealer for answers. Do not know if I trust my present dealer for advise; especially after I tell them I do not want their tank anymore.

My e-mail is open.

I assumed that if was close enough they would have needed only one.

Things will never be the same after Katrina!!!
While the area I live in is busting at the seams with new growth; Burger King and such places have raised pay from $6 to $10 per hour because they can not find enough workers; some areas of N.O. are like a ghost town. People have moved and will never return. Their homeowners insurance is calling it a flood; and their flood insurance is calling it wind driven water. A lot of banks are hurting because of all the people that just walked away from their house and said; there it is foreclose on it.
I took this picture last weekend. Yes that house and garage are in the middle of the street.