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Minnesota Department of Labor and Industry


Plumbing and Engineering home page

For general inquiries call (651) 284-5067.

The Minnesota Plumbing Code contains information about approved materials, safe installation methods and basic plumbing principles. It is important to hire knowledgeable, qualified plumbers and plumbing contractors to make the proper decisions regarding the best materials and methods for plumbing installation.

The Minnesota Department of Labor and Industry licenses plumbers to verify that they have the necessary training and knowledge to work safe and legally. It administers additional programs for apprenticeship registration, plumbing inspections and plumbing plan review.

Plumbing webpage highlights:

bullet 2015 Minnesota Plumbing Code, Chapter 4714

The 2015 Minnesota Plumbing Code, Chapter 4714, took effect Jan. 23, 2016. The code incorporates by reference the 2012 edition of the Uniform Plumbing Code with Minnesota amendments and replaces the old Minnesota Rules, Chapter 4715.

*The detailed version of the Minnesota Plumbing Code linked above is available here for your convenience. However, the Office of the Revisor of Statutes publishes the official codes.

bullet Changes to the Federal Safe Drinking Water Act (SDWA) regarding "lead-free" plumbing

Effective Jan. 4, 2014, the Reduction in Lead Drinking Water Act requires all drinking water system materials and products including plumbing pipes, fittings and fixtures introduced into commerce or for use must meet the new "lead-free" definition. This definition has been revised from not more than 8 percent to mean "not more than a weighted average of 0.25 percent lead when used with respect to the wetted surfaces of pipes, pipe fittings, plumbing fittings and fixtures."

For more information about "lead-free" requirements and exemptions, visit the U.S. EPA’s website at, http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P100GRDZ.txt

View the Reduction in Lead Drinking Water Act here.

Plumbing licensing information

Plumbing inspection information

Changes in plumbing plan review process

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