RPZ Installation

Minnesota Plumbing Code 4715.2110 dictates what type of buildings require installation of an RPZ. A permit is required and the installation must be completed by a licensed plumber.

Types of devices where back pressure is possible

  • Boiler, other than one- or two-family residential
  • Boiler, one- or two-family residential
  • Car wash
  • Chemical line
  • Chemical tank
  • Chiller
  • Cooling tower
  • Dental units (separate assembly required for each unit)
  • Fire sprinkler system
  • Flush tank (water closet, urinal, similar) (see part 4715.2150)
  • Flush valve (water closet, urinal, similar) (see part 4715.2150)
  • Food and beverage equipment or system
  • Garbage can washer
  • Glycol or other antifreeze system
  • Lab equipment
  • Laundry machine, commercial
  • Lawn, garden, or greenhouse sprinkler system
  • Operating, dissection, embalming, or mortuary table (see part 4715.1950)
  • Private potable water supply (where permitted by administrative authority)
  • Private nonpotable water supply (where permitted by administrative authority)
  • Process line
  • Process tank
  • RV dump station
  • Sewage treatment
  • Soap dispenser (see part 4715.2165)
  • Swimming pool, fountain, pond, baptistry, aquarium or similar
  • Truck fill
  • Vacuum systems or aspirators

Click Here To Learn More Here About Minnesota Plumbing Code 4715.2110


All Climate Mechanical: Heating, Cooling & Plumbing