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Minnesota Rules, part 1300.0215, subpart 6, requires plumbing plans to be submitted for review and approval prior to installation of any plumbing. The plan review requirement includes the interior plumbing system and all site utility services within the property lines that are not under a municipal utility easement. Site utility services include water services, building sanitary sewers, building storm sewers, and storm drainage pipes serving catch basins or other drainage structures within the property lines. Review of plumbing plans is not required for single-family dwellings.

The purpose of the review of site utility services is to verify compliance with the Minnesota Plumbing Code, Minn. Rules, Chapter 4714. The following are examples of some of the applicable code requirements:

  • Isolation distance between the water service and sources of pollution (see Section 609.6.1). This required isolation distance is 10 feet.

  • Isolation distance between the water services and the sanitary and storm sewers (see Section 609.2, Section 720.1, and Table 721.1). For most installations, this required isolation distance is 10 feet. If code approved drain and waste pipe materials (for inside of buildings) are used for exterior sewers, this isolation distance between water and sewer pipe does not apply. 

  • Code approved pipe materials with proper joints and connections for utility services (see Section 301.1, Table 604.1, and Table 701.1).

  • Proper pipe sizes and slopes (see Sections 717.1 and 718.1).

  • Cleanout requirements for maintenance of the sanitary sewer system (see Sections 707.4 and 719.0).

  • Testing procedures of the sanitary sewers, storm sewers, and water services (see Sections 609.4, 712.0, and 1109.0).

A delay in processing plans for reviews will often occur when the site utility plan is omitted in submitting plumbing plans. To avoid installation delays, please coordinate utilities with the interior plumbing designer and be sure that all plans are signed by the designer and the required plan review fee is included. Plans will not be reviewed until the required fee has been received. Site utility plans must show all new water service piping, sanitary sewer and storm sewer piping within the property lines, including pipe sizes, slopes, and materials. Please clearly note all municipal utility easements within the property line on the plans.

View the plumbing plan review fee calculator