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To perform water and sewer pipe‐laying work, Minnesota law requires individuals to obtain a plumbing bond or be an employee of a person in compliance with the bond and insurance requirements of Minn. Stat. §326B.46, subd. 2. Individuals performing building sewer or water service installation are not required to hold a plumbers license if they have completed pipe‐laying training.

Best practices

The following are best practices for water and sewer pipe‐laying training:

  1. Those performing water and sewer pipe‐laying training are responsible for providing qualified instructors. Qualifications generally include a mix of directly related formal training and field experience.

  2. The instructors maintain records of those who have completed the training and issue pipe‐layer cards with the expiration date to those who pass the course. Cards are carried in the field when performing pipe‐laying work and expire every three years.

  3. Instruction for water and sewer pipe‐laying includes:

    • all applicable parts of the Minnesota Plumbing Code,

    • trench safety,

    • utility locating,

    • pipe materials,

    • pipe cutting and joining techniques,

    • sanitary and storm sewers,

    • trench dewatering,

    • setting elevations,

    • hydrants,

    • manholes and catch basins,

    • confined space entry,

    • blueprint reading,

    • testing, and

    • erosion/sediment control.

  4. Refresher pipe‐laying training consisting of at least four hours of training is provided at least once every three years to maintain a pipe‐layer card.

  5. Successful completion of the course includes passing the course test.


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