CFR › Title 40 › Part 143 › §143.1340 CFR §143.13Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)No person may use any pipe, any pipe or plumbing fitting or fixture, any solder or any flux that is not lead free as defined in § 143.12 in the installation or repair of:(1)Any public water system; or(2)Any plumbing in a residential or nonresidential facility providing water for human consumption.(b)Paragraph (a) of this section shall not apply to leaded joints necessary for the repair of cast iron pipes.