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Recent government regulations have reduced the amount of allowable lead in any plumbing system that carries water for human consumption: less than .25% for pipe fittings or fixtures, and less than .2% for solder. The answer to meeting these regulations is lead-free fittings, which pose some challenges. This video by Worthington Joining Technologies provides helpful tips on soldering lead free
Visit worthingtonjoiningtech.com/leadfree for more useful tips for soldering lead-free.