[JavaBrewer]

Researching online and having local propane company out for a consult I still don't fully get tank sizing. My pool heater, Ruud, is a 400K BTU model so that works out to 4 gallons per hour.

It was connected to a propane company owned tank, a huge (300 lb) tank at the end of my property. I need access and the space for a travel trailer so I had that tank removed and we have been without a heated spa for a few years now. Time to get heated pool back online.

So my confusion lies here. The propane company said I need 250 lb or more for this application. Not just for reduced refill intervals but also about surface area needed to convert liquid to gas for my 400K BTU heater. Install galvanized 1" pipe run is 30'. We only plan to heat the spa probably on an occasional Sat or Sun evening.

Due to space and aesthetics I want the smallest tank possible, 120 lb works out to ~ 30 gallons of propane. Am I just overthinking this or do I have to submit to a 250 horizontal tank?

Thanks Folks!