So... who said you need to winterize?

[cyclopath]

check it out…

Recovery tank capacity

A 100# tank is its rating for water, and it can only be 80% filled for LPG. Butane has a specific gravity of .601 and Propane is .495 so it would hold 100# X .80 X .601 = 48 lbs of Butane and 100# X .80 X .495 = 39.6 lbs of Propane. 70F – 30F = 40F DT Butane 70F + 44F = -114 DT Propane 48# X 0.39 SpHt X 40F DT = 749 BTU 39.6# X 0.39 SpHt X 114 DT = 1761 BTU 749 BTU / 165.6 BTU = 4.5 lbs Butane vaporized 1761 BTU / 184 BTU = 9.6 lbs Propane vaporized -22” Hg is about the lowest practica…