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IAPMO: International Association of Plumbing and Mechanical Officials

IAPMO, the International Association of Plumbing and Mechanical Officials, is a nonprofit organization that develops and publishes standards focused on plumbing products. Headquartered near Los Angeles, United States, IAPMO develops the Uniform Plumbing Code, used throughout the United States, as well as having voting members around the world. In addition to developing IAPMO standards, IAPMO also offers extensive certification and testing services. Standards from IAPMO are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: StandardsSubscriptions@ansi.org or 1-212-642-4980 or Request Proposal Price.

Below are IAPMO's best-selling standards. To find additional standards, please use the search bar above.

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ANSI Z124.1.2-2005

Plastic bathtub and shower units

The purpose of this standard is to establish minimum performance requirements for plastic bathtub or shower units. Conformance to this standard and test procedures hereinshall indicate the acceptability of a plastic bathtub or shower unit as a plumbing fixture.



CSA B45.5-17/IAPMO Z124-2017

Plastic Plumbing Fixtures

Harmonization activities for plastic plumbing fixtures Standards were undertaken in 2005 by a Joint Harmonization Task Group (JHTG) on Plumbing Fixtures, in which CSA Group and IAPMO plumbing fixtures committees were equally represented. The responsibility for procedural matters and final approval of technical content was assumed by technical committees at higher levels within each SDO.  This Standard covers plastic plumbing fixtures and specifies requirements for materials, construction, performance, testing, and markings.


IAPMO/ANSI Z124.6-2007

Plastic sinks

The purpose of this standard is to establish minimum performance requirements for plastic sinks. Conformance to this standard and test procedures herein shall indicate the acceptability of a plastic sink as a plumbing fixture.


IAPMO Z1000-2019

Prefabricated Septic Tanks

This standard covers prefabricated septic tanks made of concrete, fiber-reinforced polyester (FRP), thermoplastic, or steel, intended for use in residential or commercial sewage disposal systems, and specifies design, material, performance testing, and marking requirements.


ANSI Z124.3-2005

Plastic lavatories

The purpose of this standard is to establish minimum performance requirements for plastic lavatory units. Conformance to this standard and test procedures herein shall indicate the acceptability of a plastic lavatory unit as a plumbing fixture.


IAPMO IGC 330-2018

Recirculating Shower Systems

This Standard covers portable and stationary recirculating shower systems intended for new and retrofit residential and commercial applications and specifies requirements for materials, physical characteristics, performance testing, and markings.


IAPMO/ANSI UPC-2012

Uniform Plumbing Code

The 2012 edition of the Uniform Plumbing Code (UPC) represents the most current approaches in the plumbing field. It is the fourth edition developed under the ANSI Consensus process is designated as an American National Standard by the American National Standards Institute (ANSI). Contributions to the content of this code were made by every segment of the built industry, including such diverse interests as consumers, enforcing authorities, installers/maintainers, labor, manufacturers, research/standards/ testing laboratories, special experts and users.


IAPMO/ANSI Z124.5-2013e1 (R2018)

Plastic Toilet Seats

This standard covers plastic toilet seats (including toilet seat covers) and specifies requirements for materials, construction, performance testing, and markings. The requirements of this Standard are not intended to prevent the use of alternative materi


IAPMO/ANSI Z124.5-2013e1 (R2018)

Plastic Toilet Seats

This standard covers plastic toilet seats (including toilet seat covers) and specifies requirements for materials, construction, performance testing, and markings. The requirements of this Standard are not intended to prevent the use of alternative materi


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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