First Heat Pump Tubing Product Earns NSF Certification

NSF International, an independent global organization that writes standards, and tests and certifies products for the water, food, health sciences, and consumer goods industries, has certified Centennial Plastics Inc.’s CenFuse geothermal pipes to the American National Standard for Ground-Source Geothermal Piping Systems—NSF/ANSI Standard 358-1: Polyethylene Pipe and Fittings for Water-Based Ground-Source “Geothermal” Heat Pump Systems.

Centennial Plastics is the first company to earn certification to this standard, providing engineers, regulators, and users assurance that its certified geothermal products meet minimum performance and safety requirements.

“Our CenFuse geothermal pipe certification to NSF/ANSI Standard 358-1, which includes both the pipe and the fittings, provides engineers, distributors, and contractors assurance that not only the pipe but the entire ground loop heat exchanger meets the safety and quality levels their customers demand,” said David Schnase, vice president of sales and marketing for Centennial Plastics.

To earn certification to NSF/ANSI 358-1, Centennial Plastics completed several product evaluation and facility inspection requirements, including testing to verify these products meet minimum requirements for strength and material safety. The facility audit included a review of Centennial Plastics’ product formulation, manufacturing process, use of authorized raw materials, quality control procedures, and product marking. As a prerequisite for the geothermal piping certification program, Centennial Plastics’ CenFuse geothermal pipes also earned certification to NSF/ANSI Standard 14: Plastics Piping System Components and Related Materials.

“This new NSF American National Standard provides a credible, science-based foundation that will help grow the geothermal pipe industry by helping these products gain acceptance and use by contractors, engineers, and regulators,” said Shannon Murphy, general manager of NSF International’s Plumbing Programs. “Manufacturers such as Centennial Plastics that earn certification to NSF/ANSI Standard 358 will help increase confidence and product acceptance by ensuring geothermal pipe complies with all of the standard’s requirements.”

Advances in geothermal technologies and their usage created the need for a specific voluntary certification designation for geothermal drillers. NGWA responded to this need with the designation of Certified Vertical Closed Loop Driller (CVCLD).

The CVCLD is considered an independent designation from the CWD or CWD/PI. The designation reflects an individual who has passed a written exam administered by NGWA that evaluates an individual’s knowledge of the skills and competencies associated with constructing a loop well. Click to learn more.

NGWA also published Guidelines for Construction of Loop Wells for Vertical Closed Loop Ground Source Heat Pump Systems. The guidelines are written for loop well contractors, loop well design consultants, government officials, educators, students, and consumers. It is a stand-alone document that does not supersede regulations or standards, and provides details on issues related to the construction of vertical closed loop ground source heat pump systems and offers insights to practical resolutions of the issues. Click for more information.


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