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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 establishminimum performance requirements for plastic bathtub orshower units.Conformance to this standard and test procedures hereinshall indicate the acceptability of a plastic bathtub orshower 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 Z124.5-2013e1

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 materials or method of construction provided such alternatives meet the intent and requirements of this Standard.


ANSI Z124.3-2005

Plastic lavatories

The purpose of this standard is to establish minimumperformance requirements for plastic lavatory units.Conformance to this standard and test procedures hereinshall indicate the acceptability of a plastic lavatory unit as aplumbing fixture.


IAPMO/ANSI Z124.6-2007

Plastic sinks

The purpose of this standard is to establishminimum performance requirements for plastic sinks.Conformance to this standard and test procedures hereinshall indicate the acceptability of a plastic sink as aplumbing fixture.


ANSI Z124.4-2006

Plastic water closet bowls and tanks

The purpose of this standard is to establishminimum requirements for plastic water closet bowls, tanks,tank covers, or combinations of same. Conformance to thisstandard and test procedures herein shall indicate acceptabilityof a plastic water closet, bowls, tanks, tank covers, orcombinations of same as a plumbing fixture.


IAPMO PS 37-90

Black plastic PVC or PE pressure-sensitive corrosion preventive tape

This Standard covers requirements for plastic PVC (poly vinyl chloride or its copolymers)or PE (polyethylene or its copolymers) pressure-sensitive adhesive tape intended for usein preventing corrosion of pipe and other metal surfaces. This Standard covers physicalrequirements, method of testing, other significant properties in addition to generaldescription of materials used and the method of marking and identification.


IAPMO/ANSI Z1157-2014e1

Ball Valves

This standard covers ball valves in sizes NPS-1/8 to NPS-4, with minimum rated working pressures of 860 kPa (125 psi) at 23 ªC (73ªF), intended for use in water supply and distribution systems and specifies requirements for materials, physical characteristics, performance, testing, and markings.


CSA B45.8-2013/IAPMO Z403-2013

Terrazzo, Concrete, and Natural Stone Plumbing Fixtures

This standard covers terrazzo, concrete, and natural stone plumbing fixtures and specifies requirements for materials, construction, performance, testing, and markings of these fixtures.



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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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