retrofit
Defined in 1 dictionary — U.S. Code
United States Code
42 U.S.C. § 7675 — in this section
In this paragraph, the term "retrofit" means to upgrade existing equipment where the regulated substance is changed, which—
(i) includes the conversion of equipment to achieve system compatibility; and
(ii) may include changes in lubricants, gaskets, filters, driers, valves, o-rings, or equipment components for that purpose.