CISPI, NSF announced certification program for no-hub couplings

ATLANTA — The Cast Iron Soil Pipe Institute announced that it has partnered with NSF International, an organization committed to protecting public health and the environment, to launch a new certification program that will hold no-hub cast iron couplings to rigorous standards just as with NSF Certified cast iron soil pipe and fittings.

CISPI assisted NSF International in developing this new certification program to give users confidence that the cast iron pipe, fittings and couplings used in drain, waste and vent (DWV) systems are made to the appropriate industry standards. The new program includes independent, periodic review of deflection, shear, and unrestrained hydrostatic tests as well as dimensional inspections and review of material test reports for steel and gaskets that comprise the couplings. Manufacturers will receive NSF certification for couplings that meet the CISPI 310 standard based on in-plant inspections conducted by trained NSF personnel. Once certified by NSF International, manufacturers can apply an NSF certification mark to these couplings to indicate compliance with NSF requirements and appear on NSF’s website at

"The NSF program is designed to provide peace-of-mind for contractors and engineers” said Bill LeVan, executive vice president of CISPI. “Now plumbing professionals can simply look for the NSF Marks on their cast iron pipe, fittings and no-hub couplings to be confident that the products meet the highest quality control standards."

“CISPI’s involvement in this new certification program will help manufacturers of no-hub couplings understand the importance behind obtaining NSF Certification to CISPI 310 and meeting those requirements to protect public health,” said Bob Ferguson, vice president, NSF International Water Systems.

NSF International, an independent, not-for-profit organization, certifies products and writes standards for food, water and consumer goods to minimize adverse health effects and protect the environment ( Founded in 1944, NSF is committed to protecting human health and safety worldwide and operates in more than 120 countries.

CISPI is dedicated to aiding the plumbing industry and addressing important technical aspects relating to the manufacture and installation of cast iron soil pipe and fittings and their use in the marketplace.

CISPI maintains a comprehensive quality control program for its member foundries. Each plant location is audited during the course of the year to help ensure that cast iron soil pipe and fittings bearing the Institute’s collective trademark (CI) meet the appropriate CISPI and ASTM standards. (

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