Tex. Alcoholic Beverage Code § 108.041
CARBON DIOXIDE FILTERS PROVIDED TO RETAILERS.
(a) A brewer or distributor of malt beverages may provide carbon dioxide filters to malt beverage retailers for draught systems using carbon dioxide or a carbon dioxide and nitrogen blend, commonly referred to as "beer gas."
(b) The cost of providing, maintaining, and replacing the carbon dioxide filters shall be borne by the brewer.