• For use in filling smaller C02 tanks only, will not work with a C02 regulator
This is a 20 pound aluminum C02 cylinder filled with beverage grade C02 and featuring a siphon tube inside so you can use this to fill other C02 bottles with liquid C02. Not for use with a regulator to dispense beer, or other beverages. These are only for use in filling smaller C02 bottles with liquid C02. These are 21" tall, and 7" wide. These are used tanks, appearance may vary.
Local pickup in San Leandro California only, no shipping on this item. Buy this one time filled, and bring it back for an exchange at a much lower price.
Note: If you have an empty 20 pound C02 tank with siphon installed, this is sold on an exchange basis. For exchange, you must bring an empty good condition 20 pound aluminum C02 tank (with siphon installed) to our San Leandro California location with a current hydrotest during the last five years. Click here for an explanation. If a hydrotest is required, please also purchase the optional hydrotest to avoid delays in pickup.
If your exchange cylinder was originally provided by William's Brewing, you do not need to pay for a hydrotest, even if it is past date!
Currently, your empty exchange cylinder with built in dip tube must have a hydrotest of 05/21 or greater to avoid having to pay this hydrotest charge.
How to identify a tank with an existing dip tube:
A tank with an installed dip tube will be marked 'Siphon' or will be stamped DT, ST, ED, ET, DS, D, or S. It may also have two white stripes on it, and a warning saying not to connect it to a C02 regulator.
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Apr 14, 2026 by Bill
Q: Can I exchange a 20 pound tank that does not have a dip tube for this one?
A: No, we would need a 20 pound tank with dip tube (new or used) for an exchange.
