Kris Cringle
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Thank you! Good to know about the expansion space. How does the overfill prevention device, work?Kris, self-refilling should be OK as your cylinders have an overfill prevention device. For anyone else with basic cylinders a luggage scale is very useful to prevent filling above 80%. The expansion space is vital to prevent the possibility of liquid gas entering the low pressure side of the regulator. Cylinder pressure is 5-6 bar, the low pressure side 30mbar.
Be warned the process can take a long time, pouring hot water over the donor cylinder will help.
What are you thinking for 'long time'? I take it, it's still best to go by weight even though when liquid propane blows out the bleeder, that's full.
Is the fast speed at an LPG station due to higher pressure?