Refilling 16 oz propane bottle off a 20# tank

AFTER 300+ BOTTLES I ARE EXPERIENCED

• You need an accurate scale with TARE setting PERIOD
• The POT is set on a table upside down to make only liquid available
• Tweak the bottle valve to flush most of the air out of the hose
• FREEZE the empty bottles or spend the rest of your life waiting for them to fill
• Screw bottle onto the connector pigtail
• Set scale tare to zero
• Carefully open valve on pot and watch scale go to 14 oz, then tweak valve shut
• Did the "over-run" fill the bottle to 16oz. NET?
• Overages must be bled down to 16 oz. NET
• Dunk filled bottles into a pail of water
• See bubbles?
• If there are bubbles, use ice-pick to bleed off a spootch of gas, then re-test
• Leaking bottles are a bomb
• Absolutely zero rust permitted on threads, fill port on anywhere on bottle
• Vaseline petroleum jelly smeared lightly onto bottle threads will reduce corrosion in storage
• Tilt pot upright to allow liquid to fall to bottom
• Liquid LPG has every ability to cause frostbite
• Have a fire extinguisher handy
• Threaten the life of any smoker who may approach.

I filled some 150 bottles on a popular Mexican beach back in the eighties. They squawked about the four dollar charge until they drove 50-miles to discover the hardware store had long since run out of ten dollar bottles.