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並前往https://www.safeplumbing.org/files/safeplumbing.org/documents/misc/timeline.pdf

The History of Plumbing…so far!

EPAct'92 is revised to lower faucet flow rates to. 2.2 gpm from 2.5 gpm. California enacts AB 1953 which mandates lead content in plumbing fixtures be <0.25%.

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