For more than 30 years, IAPMO has developed industry standards (e.g., IGC, IS, PS, and TS) 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. If you wish to initiate development of a new IAPMO industry standard, please complete the Standards Application Form and submit it to standards@IAPMOstandards.org.

IAPMO develops and maintains standards with the following designations:

• IGC: “IGC” is the designation used for consensus industry standards that cover products not yet addressed by existing standards.
• IS: “IS” is the designation used for consensus industry standards that cover installation practices for plumbing products.
• PS: Like IGCs, these consensus industry standards were also developed to cover products not yet addressed by existing standards. All newly developed industry product standards are now designated as “IGC.”
• TS: “TS” is the designation used for consensus industry standards that cover trailer and recreational vehicle products.
• ANSI/CAN: IAPMO ANSI standards are consensus standards that cover products and materials that are approved as ANSI and/or NSC Standards. Please visit IAPMO ANSI for information on IAPMO ANSI standards. Please visit IAPMO National Standards of Canada (NSC) to get more information on IAPMO NSC standards. 
• ASSE: ASSE Product and professional standards are developed through true industry consensus. This means that experts from all segments of the plumbing and mechanical industries, from across the country, gather to determine the minimum performance and knowledge requirements for products and professionals. Please visit ASSE for more information on ASSE standards.

IAPMO's industry standards are developed by stakeholders via an open consensus 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). All standards are reviewed and approved by the Standards Review Committee (SRC), and periodically maintained in accordance with the IAPMO policies and procedures. Existing IAPMO Industry Standards can be proposed for revision for health and safety reasons by contacting standards@IAPMOstandards.org.

Please visit  IAPMO Industry Standards to get more information on IAPMO Industry Standards. 

CREATE AN IAPMO INDUSTRY STANDARD
IAPMO can create a standard for products that are currently not addressed by existing standards. The IAPMO Standards Development professionals will research if an existing standard already exists. 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 standards@IAPMOstandards.org.

NATIONAL STANDARDS DEVELOPMENT
IAPMO's ANSI standards are developed via an open consensus process, in accordance with the ANSI Essential Requirements: Due process requirements for American National Standards and the IAPMO PP-1 Policies and Procedures for Consensus Development of American National Standards, and approved by the respective standards committee. Please visit IAPMO ANSI to get more information on IAPMO ANSI standards.

IAPMO National Standards of Canada (NSC) are developed via an open consensus process, in accordance with the Standards Council of Canada (SCC) Canadian Development, Program Overview and IAPMO PP-2:2021 Policies and Procedures for Development of National Standards of Canada. Please visit IAPMO National Standards of Canada (NSC) to get more information on IAPMO NSC standards.

To submit a proposal for change to an ANSI or NSC Standard, you may send the following information to the International Association of Plumbing and Mechanical Officials, Attention Standards Department, at standards@IAPMOstandards.org and include “Proposal for change” in the subject line:
(a)  standard designation (number);
(b)  relevant section, table, or figure number, as applicable;
(c)  wording of the proposed change, tracking the changes between the original and the proposed wording; and
(d)  rationale for the change.

REQUEST FOR INTERPRETATION
Requests for interpretation should be clear and unambiguous. To submit a request for interpretation, you may send the following information to the International Association of Plumbing and Mechanical Officials, Attention Standards Department, at standards@IAPMOstandards.org or, alternatively, at 4755 East Philadelphia Street, Ontario, California, 91761, and include “Request for interpretation” in the subject line:
(a)  the designation, title, and edition of the standard for which the interpretation is being requested;
(b)  the definition of the problem, making reference to the specific section and, when appropriate, an illustrative sketch explaining the question;
(c)  an explanation of circumstances surrounding the actual field conditions; and
(d)  the request for interpretation phrased in such a way that a “yes” or “no” answer will address the issue.

Current Interpretations listed below:
CSA B45.5+IAPMO Z124-2017
IAPMO Z124.5-2013e1 (R2018)