Federal and State lead regulations do not cover any pipes, pipe fittings, plumbing fittings, or fixtures, that are used exclusively for non-potable services like manufacturing, industrial processing, irrigation, outdoor watering, or other uses where the water is not anticipated to be used for human consumption. This includes toilets, bidets, urinals, fill valves, flushometer valves, tub fillers, shower valves, service saddles, or water distribution main gate valves that are two inches in diameter or larger. Other fixtures that may contain lead in home plumbing include cover hose bibs, bathtub fixtures, and shower heads.
Be sure that only valves and filters intended for drinking water supply are used in any home plumbing project.