Plumbing Contractors Trade Associations

American Rainwater Catchment Systems Association (ARCSA)

Promotes rainwater harvesting best practices and training that plumbing contractors use to design, install, and maintain compliant rainwater systems.

https://www.arcsa.org/ Membership: 1,500

American Society of Plumbing Engineers (ASPE)

The international society for plumbing system designers; provides standards, education, certification, and a contractor-connected network that improves design-build outcomes.

https://www.aspe.org/ Membership: 7,400

American Water Works Association (AWWA)

Largest water-sector association; contractors tap AWWA resources on backflow, cross‑connection, materials standards, and utility coordination for potable water projects.

https://www.awwa.org/ Membership: 50,000

Associated Builders and Contractors (ABC)

National trade association for merit-shop contractors across all trades; supports plumbing contractors with advocacy, safety programs, workforce training, and business development.

https://www.abc.org/ Membership: 23,000

Association of Water Technologies (AWT)

Industry group for water-treatment companies; helpful to plumbing contractors servicing boilers, cooling, and process-water systems with technical training and networking.

https://www.awt.org/ Membership: 550

Canadian Institute of Plumbing & Heating (CIPH)

Canada’s national association for the plumbing and heating supply chain; a key partner for U.S. contractors working cross‑border or with Canadian manufacturers and distributors.

https://www.ciph.com/ Membership: 260

International Association of Plumbing and Mechanical Officials (IAPMO)

Code body behind the Uniform Plumbing Code; provides code development, product certification, training, and a large member community including contractors.

https://www.iapmo.org/ Membership: 4,500

International Code Council (ICC)

Developer of the International Plumbing Code and related standards; offers code resources, certification, and advocacy used by contractors and inspectors nationwide.

https://www.iccsafe.org/ Membership: 64,000

Irrigation Association (IA)

Trade association for ag/landscape irrigation; supports plumbing contractors who install or service irrigation with certifications, education, and industry advocacy.

https://www.irrigation.org/ Membership: 1,800

Mechanical Contractors Association of America (MCAA)

National association of union-signatory mechanical and plumbing contractors; provides contractor education, safety, tech, and peer benchmarking to strengthen project delivery.

https://www.mcaa.org/ Membership: 2,800

National Association of Home Builders (NAHB)

Represents builders, remodelers, and trade partners; plumbing contractors benefit from codes/standards advocacy, housing market intelligence, and business education.

https://www.nahb.org/ Membership: 140,000

National Association of Sewer Service Companies (NASSCO)

The sewer/water/stormwater rehab association; contractors use NASSCO’s PACP/LACP/MACP training, specs, and networking for trenchless and pipeline rehabilitation work.

https://www.nassco.org/ Membership: 700

National Association of Women in Construction (NAWIC)

Advocates and networks for women across all construction trades; supports plumbing contractors with talent attraction, leadership development, and local chapter engagement.

https://www.nawic.org/ Membership: 6,000

National Ground Water Association (NGWA)

Groundwater professionals’ association; valuable to plumbing contractors who drill wells, install pumps, or service private water systems, with training and events like Groundwater Week.

https://www.ngwa.org/ Membership: 13,000

National Kitchen & Bath Association (NKBA)

Kitchen & bath industry’s flagship association (owner of KBIS); connects plumbing contractors to designers, manufacturers, and market intelligence across North America.

https://www.nkba.org/ Membership: 55,000

National Rural Water Association (NRWA)

Largest U.S. network of rural/small water and wastewater utilities; fosters contractor–utility collaboration on small‑system projects and technical assistance.

https://nrwa.org/ Membership: 31,000

Plumbing-Heating-Cooling Contractors—National Association (PHCC)

The primary U.S. trade group for plumbing and HVACR contractors; delivers codes/advocacy, workforce pipelines, business education, and national/state/local chapter support.

https://www.phccweb.org/ Membership: 3,300

PHCC—Texas (Associated Plumbing-Heating-Cooling Contractors of Texas)

State federation serving Texas plumbing/HVAC contractors; provides licensing education, safety training, and advocacy tailored to Texas regulations and markets.

https://phcc-tx.org/ Membership: 300

Water Environment Federation (WEF)

Professional society for wastewater and stormwater professionals; connects contractors to utility owners, operators, and technologies that impact collection systems and treatment.

https://www.wef.org/ Membership: 34,000

Water Quality Association (WQA)

Trade association for point‑of‑use/point‑of‑entry water treatment; helpful to plumbing contractors offering filtration/softening, with education, certification, and advocacy.

https://www.wqa.org/ Membership: 2,500