Made in USA | A fully certified line (including NSF) of standard duty couplings manufactured of domestically produced components | A quality low-cost alternative to applications where structural reinforcement is not a concern | The original no-hub coupling that has been in use since 1965 | In full compliance to ASTM C564, CISPI 310 and ASTM C1277, and also carries IAPMO, Canadian Std. Association, and NSF Certifications