Ron Goldstein Rongold
What is the preferred way to manifold 3-120 gallon propane tanks together ???

One primary regulator at each tank and then a manifold with the output pipe going to the secondary regulator ???

OR

Piping from each tank going to a manifold and the output from that manifold going to a primary regulator with the output of that primary regulator feeding the secondary regulator ???


RON
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78buckshot
I think your LP guy would have a preference.
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murphy
My three tanks are manifolded directly from the tanks which then feeds a single high pressure to 10 psi regulator.
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Cobranut
murphy;52390 wrote:
My three tanks are manifolded directly from the tanks which then feeds a single high pressure to 10 psi regulator.


I'd think this would be the preferred method, to keep the pressures in each tank equal.
It would be impossible to have three regulators that would flow exactly the same, and have exactly the same pressure set point.
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Skip Douglas SkipD
Rongold;52386 wrote:
Piping from each tank going to a manifold and the output from that manifold going to a primary regulator with the output of that primary regulator feeding the secondary regulator ???
In my opinion, this is the only practical choice.
Skip Douglas
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Birken Vogt
High pressure across all tanks manifolded together to a single regulator of whatever type is required.

If you manifold them in this way they will all go down about the same amount at the same time. If one is in hotter sun or darker color it will go down faster but it doesn't really matter, if any of them have fuel then it will still work.

If you have individual regulators per tank, the regulator that is set highest will go down first. Sometimes one tank will go all the way to 10psi or whatever before the other begins to flow. But often they will still go down together (usually not balanced at all though) if the regulators are balanced pretty close.
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Cobranut
I recall back when my Dad had travel trailers, they had a valve arrangement which would allow one tank to completely empty before automatically switching to the other tank.
That was nice, because it let you go fill the empty tank while still using the other.
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Birken Vogt
Cobranut;52413 wrote:
I recall back when my Dad had travel trailers, they had a valve arrangement which would allow one tank to completely empty before automatically switching to the other tank.
That was nice, because it let you go fill the empty tank while still using the other.


Yes, but you are not going to go get a 120 gallon tank filled at the convenience store

(it would be completely legal but impractical)

If you are emptying out one or the other tank first, you are losing the benefit of the vaporization area of all the tanks at the same time also.
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Cobranut
Birken Vogt;52418 wrote:
Yes, but you are not going to go get a 120 gallon tank filled at the convenience store

(it would be completely legal but impractical)

If you are emptying out one or the other tank first, you are losing the benefit of the vaporization area of all the tanks at the same time also.


Good points.
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John Patrick
I recently had a 500 gallon tank installed in parallel with an existing 250 gallon tank.
The propane company plumbed both tanks into a single high pressure regulator.
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