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IAPMO Industry Standards

For more than 30 years, IAPMO has developed industry standards (e.g., IGCs, PSs, and TSs) to cover innovative new plumbing products not covered by existing standards. Often, new products or new technologies surge ahead far faster than most standards can keep pace. Through our industry standards, IAPMO provides manufacturers and product developers a vehicle for introducing new products to the marketplace in timely manner.

Although IAPMO industry standards have traditionally focused primarily on plumbing, in the last few years IAPMO has also developed standards for solar heating systems and components, mechanical products (e.g., heating, ventilation, cooling and refrigeration system products), and also for products used in the recreational vehicle and manufactured housing industry.

IAPMO's industry standards are jointly developed by IAPMO staff and stakeholders via an open process, which utilizes the principles of consensus, in accordance with IAPMO Policy S-001 and IAPMO Policy S-008. Such standards are widely accepted by industry and regulators (jurisdictions). Additional information can be found in our Standards brochure.

If you wish to initiate development of a new IAPMO industry standard or revise an existing one, please fill in the Standards Application Form and submit it to

The following IAPMO/ANSI standards are published and are available for purchase:

IAPMO/ANSI S1001.4-2015 Energy Production Rating of Solar Heating Collectors
IAPMO/ANSI S1001.1-2013 Design and Installation of Solar Water Heating Systems
IAPMO/ANSI Z124.5-2013e1 Plastic Toilet Seats
IAPMO/ANSI Z124.7-2013 Prefabricated Plastic Spa Shells
IAPMO/ANSI Z124.8-2013e2 Plastic Liners for Bathtubs and Shower Receptors
IAPMO/ANSI Z1000-2013 Prefabricated Septic Tanks
IAPMO/ANSI Z1001-2016 Prefabricated Gravity Grease Interceptors
IAPMO/ANSI Z1002-2014 Rainwater Harvesting Tanks
IAPMO/ANSI Z1033-2015 Flexible PVC Hoses and Tubing for Pools, Hot Tubs, Spas, and Jetted Bathtubs
IAPMO/ANSI Z1088-2013 Pre-Pressurized Water Expansion
IAPMO/ANSI Z1157-2014e1 Ball Valves
ASPE/IAPMO/ANSI Z1034-2015 Test Method for Evaluating Roof Drain Performance