"Most" common size in trailers
30# Cylinder - 7 Gallon Bottle
OPD is required
Filled by weight - weighs about 55 pounds when full
Holds 30 pounds of propane (7 gallons of propane)
Contains 640,500 BTU when full
Widely used for grilling, camping, and RV travel
23.5"H X 12.2"W
Next most common:( the size you see often at propane exchange places like home depot or lowes or ace hardware)
20# Cylinder - 5 Gallon Bottle
OPD is required
Filled by weight - weighs about 40 pounds when full
Holds 20 pounds of propane (4.7 gallons of propane)
Contains 430,000 BTU when full
Widely used for grilling, camping, and cooking
17.5"H X 12.2"W