Plumbing Board final interpretations
The state Plumbing Board is charged with interpreting the code. Below are final interpretations issued by the board.
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PB0172 – Island venting (July 16, 2024)
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PB0162 – Water conditioning installation (April 16, 2024)
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PB0160 – Storm drainage piping (Nov. 6, 2023)
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PB0159 – Storm drainage surcharge (Feb. 10, 2023)
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PB0158 – Suds-producing fixtures (Jan. 17, 2023)
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PB0157 – Water hammer arrestor (Jan. 17, 2023)
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PB0156 – Section 611.5, isolation and bypass requirements for water conditioning installations (July 19, 2022)
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PB0154 – Section 1017, oil and flammable liquid interceptors (Jan. 25, 2022)
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PB0152 – Section 603.5.19, pure water systems (July 27, 2020)
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PB0141 – Section 709.1, drain by gravity (Oct. 15, 2019)
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PB0098 – Atmospheric vacuum breaker (Oct. 8, 2018)
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PB0096 – Exterior sump and receiving tank (Aug. 28, 2018)
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PB0092 – Double check assembly with an atmospheric vent for a domestic water connection serving a combi-oven (Oct. 9, 2017)
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PB0088 – Double check backflow prevention assemblies (DC) and double check detector fire protection backflow prevention assemblies that are an integral part of a fire protection system (March 20, 2017)
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PB0085 – Use of polyethylene piping for building supply piping (June 15, 2016)
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PB0083 – Air gap fittings and drainage from domestic dishwashers (May 11, 2016)
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Definition of "Building Supply" (May 11, 2016)
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Exterior venting (May 22, 2014)
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Low pressure hazard (Sept. 16, 2013)
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Basic plumbing principles and the installation of fixtures (Sept. 13, 2013)
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Single-wall heat exchangers (Feb. 11, 2013)
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Flexible piping and water distribution systems (Feb. 11, 2013)
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Oil and flammable liquid separator (Sept. 11, 2012)
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Gutter installation (Nov. 21, 2011)
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Sump pumps and discharge piping (March 14, 2011)
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35-foot limitation on horizontal plastic piping (March 14, 2011)
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ASSE Standard 1017 certified valves (Aug. 18, 2010)
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Sizing of building drains and branches (May 11, 2009)
Submit a request to the Plumbing Board
Request for Interpretation form
Questions?
Contact us at dli.ccldboards@state.mn.us.