Q2 2024

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IAPMO Honored with President’s `E Star’ Award for Continued Excellence in Increasing U.S. Exports

The International Association of Plumbing and Mechanical Officials (IAPMO) was honored Tuesday with the President’s “E Star” Award for Export Service at a ceremony hosted by U.S. Secretary of Commerce Gina M. Raimondo in Washington, D.C., marking the second time the association has been recognized for its high-yielding efforts to increase U.S. exports. IAPMO received the President’s “E” Award in 2019.

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IAPMO Needs You and Your Voice at the 95th Annual Education and Business Conference in Las Vegas

One of the distinct pleasures of serving as IAPMO president is the opportunity to invite our members to attend the annual Education and Business Conference, this year back in a familiar city for this long- standing event, Las Vegas, which has hosted most recently in 2015 and 2007. This 95th installment, Sept. 22-26, will return to the Planet Hollywood Las Vegas Resort & Casino, located conveniently in the midst of all Sin City’s glitz on the Las Vegas Strip. 

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U.S. EPA Released Tank-Type Toilets Version 2.0 WaterSense® Specification

The U.S. Environmental Protection Agency (EPA) has released Version 2.0 of its Specification for Tank-Type Toilets to earn the WaterSense® label. These toilets have been eligible to earn the WaterSense label since the release of the WaterSense Specification for Tank-Type Toilets in 2007. However, EPA has modified the water efficiency criteria for dual-flush toilets by eliminating the effective flush volume calculation.

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Seattle Advances Water Demand Calculator Use With Training

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With an eye toward Seattle mandating use this year of IAPMO’s Uniform Plumbing Code (UPC®Appendix M — the Water Demand Calculator® — for multifamily buildings, the county and local ASSE and IAPMO chapters recently held an in-person training for inspectors, installers and design professionals.

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IAPMO to Contribute Leadership, Expertise to Development of PFAS Standards

With the U.S. Environmental Protection Agency (EPA) issuing the first national drinking water standards for per- and polyfluoroalkyl substances (PFAS), the International Association of Plumbing and Mechanical Officials (IAPMO®) continues to lend its expertise and leadership to helping manufacturers and the industry navigate the changes and ensure a seamless transition.

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IAPMO and ASPE Co-publish Capacities of Stacks and Horizontal Drains in Storm Drainage Systems White Paper

The International Association of Plumbing and Mechanical Officials (IAPMO) and the American Society of Plumbing Engineers (ASPE) have co-published White Paper 2-2024: Capacities of Stacks and Horizontal Drains in Storm Drainage Systems.


The sizing for storm drainage systems is dependent upon flow capacity equations used to calculate velocities and flow rates in pipe conduits. One of the variables in the equations is the coefficient of roughness. This white paper explores how the roughness of different types of material will change the computational results that are dependent upon the roughness coefficient of the pipe.

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IAPMO Government Relations Corner

IAPMO Supports Bill that Would Address Water Access Gap Affecting Underserved and Tribal Communities

The International Association of Plumbing and Mechanical Officials (IAPMO) is proud to voice its enthusiastic support for the Water, Sanitation, and Hygiene Access Data Collection Act of 2024 (WASH Access Data Collection Act), introduced in the U.S. Senate Wednesday to study and devise solutions to the lack of running water and basic indoor plumbing that affects more than 2 million Americans.


Co-sponsored by U.S. Senators Ron Wyden (D-Oregon), Jeff Merkley (D-Oregon), and Ben Ray Lujan (D-New Mexico), the bill would establish an interagency Water and Sanitation Needs Working Group to conduct surveys and develop reports no less frequently than every five years and mandate development of a cost estimate for capital improvements necessary to ensure that all U.S. households have access to reliable drinking water and adequate sanitation.

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U.S. GSA Officially Recognizes Uniform Plumbing Code (UPC®)

The U.S. General Services Administration (GSA) has incorporated IAPMO’s Uniform Plumbing Code (UPC®) in its newly released Facilities Standards for the Public Buildings Service (P100), marking the first instance that this federal agency has officially referenced the Uniform Codes.


With more than 300,000 federal buildings nationwide, the federal government is the country's largest landlord. The GSA owns and leases more than 363 million square feet of space in 8,397 buildings in more than 2,200 communities nationwide.

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U.S. GSA’s P100 Document Now Requires ARCSA International Standard Compliance

ARCSA International is pleased to announce the United States General Services Administration (GSA) has accepted its proposed change for the Facilities Standards for the Public Buildings Service (P100), requiring major capital projects of more than 5,000 square feet employing rooftop rainwater catchment and harvesting systems to comply with relevant ARCSA/ASPE/ANSI standards.

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PHCC Legislative Conference: Collaboration on Capitol Hill

The Plumbing-Heating-Cooling Contractors–National Association (PHCC) welcomed PHCC members, chapter executives, and corporate partners to Washington, D.C., May 21-22, to meet with lawmakers and educate them on energy, economic, and workforce policies that are important to the industry and consumers.

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IAPMO Codes and Standards Corner

IAPMO Advances Development of 2027 Uniform Codes During Technical Committee Meetings

IAPMO recently completed Technical Committee Meetings toward the development of the 2027 editions of the Uniform Plumbing Code (UPC®) and Uniform Mechanical Code (UMC®), which will update the 2024 UPC and UMC, American National Standards governing the installation and maintenance of plumbing and mechanical systems nationwide.


During the May 5-10 meetings, the committees acted on 689 proposed amendments to the 2027 editions of the Uniform Codes.

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ASSE/ARCSA/IAPMO/ANSI Series 21000 Now Available

ASSE/ARCSA/IAPMO/ANSI Series 21000-2022, Professional Qualifications Standard for Rainwater Catchment Systems Personnel, has been designated as an American National Standard by the American National Standards Institute (ANSI) and is now available for purchase.

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2024 IAPMO Solar, Hydronics and Geothermal; Swimming Pool, Spa and Hot Tub Codes Now Available

IAPMO has published the 2024 editions of the Uniform Solar, Hydronics and Geothermal Code® (USHGC) and Uniform Swimming Pool, Spa and Hot Tub Code® (USPSHTC) in both hardcopy and electronic versions, completing a three-year consensus development cycle accredited by the American National Standards Institute (ANSI). These publications may be purchased through the IAPMO web store at the following URL: https://iapmomembership.org/store/

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IAPMO Seeks UPC Task Group Members

IAPMO is seeking applicants to serve as technical experts on Uniform Plumbing Code (UPC®) task groups.

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IAPMO Seeks UMC Task Group Members

The International Association of Plumbing and Mechanical Officials (IAPMO®) is seeking applicants to serve as technical experts on Uniform Mechanical Code (UMC®) task groups. 

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IAPMO Seeks Technical Committee Members for 2027 USPHTC, USHGC

IAPMO is seeking volunteers to participate on two technical committees working toward the development of the 2027 editions of the Uniform Swimming Pool, Spa, and Hot Tub Code® (USPSHTC) and Uniform Solar, Hydronics and Geothermal Code® (USHGC). The deadline to submit an application is August 30.

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ASSE Extends Deadline to Apply for Working Groups Developing National Standards ASSE 1087 and ASSE 1378

ASSE International has extended the deadline for applicants wishing to serve on two unique working groups developing new national standards: Performance Requirements for Commercial and Food Service Water Treatment Equipment Utilizing Drinking Water (ASSE 1087) and Performance Requirements for Point of Entry Anion Exchange – Nitrate Reduction (ASSE 1378).

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IAPMO Code Change Monographs Now Available

IAPMO has made the 2024 Uniform Plumbing Code (UPC®) and Uniform Mechanical Code (UMC®) Technical Committee Meeting Monographs available for download.

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Structural Water Savings: Can Right Sizing of Water Systems Really Save Water? (The Answer is yes)

Episode Description

In this episode host Christoph Lohr discusses structural and behavioral water waste with Jim Lutz, a retired researcher from Lawrence Berkeley National Lab. Jim details his career, focusing on water heater efficiency and plumbing systems, and explains how his research has shown the significance of structural waste in residential plumbing, particularly in hot water distribution systems. He emphasizes the inefficacy of low-flow showerheads due to structural waste and advocates for compact plumbing designs to enhance water and energy conservation. Jim also highlights the long-term impact of these decisions on building efficiency and conservation efforts.

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