How can I be sure that the faucet or plumbing device meets the NSF Standard?
Products certified against the NSF Standard carry a certification mark of the certifying organization. NSF International publishes listing books of products that it has tested and certified against the NSF Standard. NSF International also maintains these listings through its Internet site. One can obtain Listing books from NSF International at 1-800-NSF-MARK, or visit its website at www.nsf.org.