Most plumbing contractors pick their next software, supplier, or fleet provider after a 10-minute conversation at a plumbing trade show. The booth matters less than which room you're in.

WWETT draws 10,000+ wastewater and drain cleaning contractors. Design & Construction Week draws kitchen-bath specifiers. PHCC Connect draws residential service contractors running 5-20 truck operations. If you sell trenchless rehab equipment at KBIS, you wasted a trip.

The 2026 calendar has 65+ US plumbing conferences, plumbing expo events, and plumbing convention gatherings.

Here's our list with dates, locations, and who each one is best for.

WWETT Show

Location: Indianapolis, IN

Dates: February 16-19, 2026

Purpose: Training/Certification

Attendee Count: 10,000+

Website: https://www.wwettshow.com/

The WWETT show covers wastewater, septic, drain cleaning, and specialty plumbing. 500+ exhibitors, 100+ education sessions across 10 tracks. Sewer camera inspections, pipe lining, trenchless rehabilitation. CE credits available. Recurring service revenue and RTO/fleet are major themes on the expo floor.

Why attend WWETT Show: 10,000+ wastewater and specialty plumbing professionals over 4 days. If you sell drain cleaning equipment, septic systems, trenchless technology, or fleet and dispatch software for service trucks, this is the largest concentration of your buyer in one building.

Design & Construction Week (KBIS + IBS)

Location: Orlando, FL

Dates: February 17-19, 2026

Purpose: Growth/Revenue

Attendee Count: 10,000+

Website: https://designandconstructionweek.com/ | https://www.kbis.com/ | https://www.buildersshow.com/

Design & Construction Week co-locates KBIS 2026 (Kitchen & Bath Industry Show) and the IBS builders show (NAHB International Builders' Show). KBIS draws kitchen and bath fixtures, faucets, water heaters, and smart home products. IBS draws builders and remodelers who specify plumbing. 500+ exhibitors at each show.

Why attend Design & Construction Week: 10,000+ at each show, co-located over 3 days. The audience specifies and installs residential plumbing products. If you sell fixtures, kitchen-bath products, or anything into the remodel and new-construction channel, this is where specification decisions happen.

PHCC Connect

Location: Milwaukee, WI

Dates: October 19-22, 2026

Purpose: Training/Certification

Attendee Count: 500-1,000

Website: https://www.phccweb.org/phccconnect2026-save-the-date/

PHCC Connect is the national plumbing convention for the Plumbing-Heating-Cooling Contractors Association. 20+ educational sessions on workforce, business management, and leadership. Product & Technology Showcase with 75+ exhibitors. Hilton Milwaukee City Center.

Why attend PHCC Connect: 500-1,000 plumbing, heating, and cooling contractors over 4 days. Smaller headcount, but the room is PHCC members who run contracting businesses and make purchasing decisions for their shops. Higher signal per conversation than the 10,000-person shows.

AWWA ACE Annual Conference & Exposition

Location: Washington, DC

Dates: June 21-24, 2026

Purpose: Training/Certification

Attendee Count: 10,000+

Website: https://ace.awwa.org

AWWA ACE is the American Water Works Association's annual conference. 10,000+ water industry professionals. Covers drinking water, treatment, distribution, and infrastructure. Plumbing contractors and engineers attend for water systems, piping, and municipal projects.

Why attend AWWA ACE: 10,000+ water and wastewater professionals over 4 days. The buyer here is municipal and infrastructure, not residential. If you sell water infrastructure, treatment, or piping products into public works and large commercial projects, this is where those contracts start.

WEFTEC

Location: New Orleans, LA

Dates: September 27 - October 1, 2026

Purpose: Training/Certification Attendee

Count: 10,000+

Website: https://www.weftec.org/

WEFTEC is the largest annual wastewater conference in North America. Collection systems, treatment, pumping, and trenchless technology. Overlaps with plumbing contractors doing sewer, drain, and municipal work.

Why attend WEFTEC: 10,000+ wastewater and water professionals over 5 days. Similar audience to WWETT but weighted toward treatment and municipal infrastructure rather than residential service. If you sell wastewater equipment, trenchless technology, or collection system products, attend both and compare lead quality.

Flow Expo USA

Location: Pomona, CA

Dates: March 14, 2026

Purpose: Growth/Revenue

Attendee Count: 5,000-10,000

Website: https://flowexpousa.com/

Flow Expo USA is a West Coast plumbing expo covering HVAC, plumbing, and mechanical trades. Exhibitors and education for contractors, distributors, and technicians. Piping, hydronics, and building systems.

Why attend Flow Expo USA: 5,000-10,000 HVAC and plumbing professionals in a single day. One-day format means lower time commitment. If you sell into the California plumbing and mechanical channel, this is the most efficient regional event on the calendar.

ServiceTitan Pantheon

Location: Orlando, FL

Dates: October 5-7, 2026

Purpose: Growth/Revenue

Attendee Count: 2,000-5,000

Website: https://www.servicetitan.com/events

ServiceTitan Pantheon is ServiceTitan's annual event for trades professionals, including plumbing and HVAC. Walt Disney World Swan & Dolphin Resort. Training, networking, keynotes focused on software and technology for home services contractors.

Why attend ServiceTitan Pantheon: 2,000-5,000 plumbing and HVAC contractors over 3 days. Every attendee either uses or is evaluating field service software. The room self-selects for tech-forward contractors with budget. If you sell software, marketing services, or technology into home services, this audience is already spending.

MCAA Annual Convention

Location: Phoenix, AZ

Dates: March 15-19, 2026

Purpose: Training/Certification

Attendee Count: 2,000-5,000

Website: https://www.mcaa.org/events/calendar/2026-mcaa-annual-convention/

The MCAA (Mechanical Contractors Association of America) Annual Convention brings together mechanical contractors, including commercial plumbing. Theme: Beyond the Horizon. Keynotes from Drew Brees, Zack Kass (AI), and Michael Massimino. Education on leadership, technology, and project management.

Why attend MCAA Convention: 2,000-5,000 mechanical contracting executives over 5 days. This is the commercial side of plumbing. Attendees run large-scale mechanical contracting operations. If you sell into commercial mechanical and plumbing contractors, the decision-makers are at this event, not at WWETT.

No-Dig Show

Location: Palm Springs, CA

Dates: March 29 - April 2, 2026

Purpose: Training/Certification

Attendee Count: 2,000-5,000

Website: https://nodigshow.com/

No-Dig Show is the North American trenchless technology conference. Pipe rehabilitation, CIPP, directional drilling, and inspection. The audience is plumbing contractors, engineers, and utility professionals focused on sewer and underground work.

Why attend No-Dig Show: 2,000-5,000 trenchless and underground utility professionals over 5 days. Narrowest audience on this list, but if you sell pipe lining, inspection cameras, or rehabilitation products, every conversation is with someone who needs what you make.

Nexstar Network Super Meeting

Location: Aurora, CO

Dates: September 30 - October 3, 2026

Purpose: Growth/Revenue

Attendee Count: 500-1,000

Website: https://www.nexstarnetwork.com/super-meeting/

Nexstar Network Super Meeting brings together home service contractors from plumbing, HVAC, and electrical. Education on operations, marketing, and business growth. Peer networking and best-practice sharing for residential service companies.

Why attend Nexstar Super Meeting: 500-1,000 residential service contractors over 4 days near Denver. Like PHCC Connect, the headcount is small but the audience is concentrated. Nexstar members tend to be growth-oriented contractors investing in their businesses. If you sell software, marketing, or operations tools to plumbing and trades contractors, these are buyers actively looking to spend.

Download the complete US plumbing conference list

Get the full 2026 conference calendar with dates, locations, attendee counts, and strategic recommendations for every major plumbing and trades event.

What's inside: 65+ US events with all dates and locations, trade show vs. association breakdown, exhibitor priority tiers, attendee count comparisons, geographic coverage by US region, pre-event outreach email templates, and post-conference follow-up sequences.

Download the complete list