Ductile Iron Pipe Research Association
245 Riverchase Parkway E., Suite O
Birmingham, AL 35244-1856

205-402-8700 - Phone
205-402-8730 - Fax
Web Site: www.dipra.org

American Water Works Association
6666 West Quincy Ave.
Denver, CO 80235

303-794-7711 - Phone
Web Site: www.awwa.org

NSF International
PO Box 130140
Ann Arbor, MI 48113-0140

734-769-5179 - Phone
734-769-0109 - Fax
Web Site: www.nsf.com