Plumbers & Steamfitters Local 400

Plumbers & Steamfitters Local 400 Plumbers & Steamfitters UA Local 400

Plumbers & Steamfitters UA Local 400 is comprised of approximately 2,000 members serving eighteen counties in Northeast Wisconsin. We are a local union that is affiliated with the United Association of Plumbers & Pipefitters, comprised of approximately 345,000 members across the US and Canada. Our main purpose is to provide training for our members and qualified manpower to our 105 signatory contr

actors for all aspects of the plumbing, pipe fitting, HVACR service, and pipe fabrication industries.

08/26/2026

See Dusty TIG welding a stainless steel joint, a testament to the skill and dedication of tradespeople. Becoming proficient in high-tech welding like this can take 2-3 years, sometimes up to 4, depending on individual aptitude and hard work. It requires precision, especially for x-rayed welds, with training often provided by unions like Local 400.

Wisconsin is well represented at the 41st United Association National Convention!It was great to have members and leader...
08/19/2026

Wisconsin is well represented at the 41st United Association National Convention!

It was great to have members and leaders from all of the Wisconsin UA Locals together in one place, standing united and representing our trades, our members, and the future of the pipe trades.

08/19/2026

This isn't your typical welding! Submerged arc welding uses a flux powder to shield the arc, creating incredibly clean and strong welds. It's a game-changer for large projects like this 32-inch pipe, saving hours of labor compared to traditional field welding. You can even learn this skill at the Local 400 training center!

From the jobsite to the training center, our members are what make Local 400 strong. We appreciate everything you’ve con...
08/13/2026

From the jobsite to the training center, our members are what make Local 400 strong. We appreciate everything you’ve contributed to our union and the pipe trades throughout the years.

Congratulations to all of our August milestone members! Thank you for being a part of Local 400 and for continuing to help move our union forward.

08/12/2026

Step inside Team Industries and witness the precision of pipe spool fabrication. In a controlled environment, quality and safety are paramount, resulting in superior welds and finishes compared to field work. From small projects to massive orders, they serve diverse industries like oil, power, and brewing.

08/05/2026

Discover why Northeast Wisconsin became the epicenter for straight-line pipe and vessel fabrication. Learn how local expertise, honed in the paper industry, now drives demand and innovation in a controlled environment, with exciting growth expected.

07/30/2026

Witness apprentices mastering orbital welding, a fully automated process essential for pharmaceutical, data center, and microchip industries. It's not your traditional welding; it's precision, programmed by humans, for perfectly clean welds. See the specialized tools that make it happen.

07/27/2026

Help us spread the word about pipetrades careers- subscribe to our YouTube channel. Link to subscribe in comments.

As July comes to a close, we want to give a well-earned shoutout to the members celebrating milestone anniversaries this...
07/24/2026

As July comes to a close, we want to give a well-earned shoutout to the members celebrating milestone anniversaries this month.

Your hard work, skill, and commitment have helped shape Local 400 into what it is today. Every project you've completed, every apprentice you've helped along the way, and every year you've dedicated to the trade has made a lasting impact on our union and the future of the pipe trades.

Thank you for everything you've done and continue to do. We're proud to have you as part of Local 400, and we're honored to celebrate these incredible milestones with you. Congratulations!

07/22/2026

Dedicated to empowering Northeast Wisconsin's future! We connect high schoolers with apprenticeships and support veterans transitioning into the trades. Creating opportunities for all.

Address

2700 Northridge Drive, PO Box 530
Kaukauna, WI
54130

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm

Telephone

+19204620400

Website

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