PDI is an Association of manufacturers of engineered plumbing products in a business area commonly referred to by the mechanical side of the construction industry as "the drain business".  Our members and licensees make products such as: floor drains, roof drains, sanitary floor drains, cleanouts, water hammer arresters,  backwater valves, grease interceptors, fixture supports, and other drainage specialties.

Our objective is to promote the advancement of Engineered Plumbing Products through publicity, public relations, research, and standardization of product requirements; as well as to prepare, edit, and publish Standards relating to plumbing products, and to provide certified testing, rating, and installation procedures for Grease Interceptors, Standard PDI-G101 and PDI-G102, and Water Hammer Arresters, PDI-WH201.   PDI through its staff and members also participates in the development of drainage related standards through ASME and the ASME A 112 Standards Committee and the development of product standards at IAPMO, CSA, and ASSE.  PDI and its members are also active in the development of model plumbing codes, UPC, IPC and NSPC.

PDI maintains testing equipment in independent testing laboratories for the purpose of testing Water Hammer Arresters for compliance with Standard PDI-WH201 and Grease Interceptors for compliance with Standard PDI-G101 and PDI-G102.  Certified Products carry the Seal of the Plumbing & Drainage Institute as evidence that the product has met the specified requirements of the Institute’s Standards.

Please feel free to contact us for more information.