Minnesota Administrative Rules
Agency 222 - Plumbing Board
Chapter 4714 - PLUMBING CODE
Part 4714.0710 - DRAINAGE OF FIXTURES LOCATED BELOW THE NEXT UPSTREAM MANHOLE OR BELOW THE MAIN SEWER LEVEL
Universal Citation: MN Rules 4714.0710
Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1. 710.12.
UPC section 710.12 is amended to read as follows:
710.12
Grinder Pump Ejector.
Grinder pumps shall be permitted to be used. The sump basin storage volume and
the pump capacity shall be sized adequately to prevent overloading and shall at
a minimum accommodate water demand peak flow from all fixtures.
710.12.1
Discharge Piping. The
discharge piping shall be sized in accordance with the manufacturers
installation instructions and shall be not less than 1 1/4 inches (32 mm) in
diameter. A check valve and fullway-type shutoff valve shall be located within
the discharge line.
Subp. 2. Section 710.13.
UPC section 710.13 is amended to read as follows:
710.13
Macerating Toilet
Systems. Listed macerating toilet systems shall be permitted as an
alternate to a sewage pump system only in one-or two-family dwellings when
gravity flow is not possible. Not more than one bathroom group is permitted to
discharge into a macerating toilet system. One bathroom group consists of: a
toilet; a lavatory; and a shower or bathtub. Components of macerating toilet
systems shall be accessible.
710.13.1
Sumps. The sump shall be watertight and gastight.
710.13.2
Discharge Piping. The
discharge piping shall be sized in accordance with the manufacturers
instructions and shall be not less than 3/4-inch (20 mm) in diameter. The
developed length of the discharge piping shall not exceed the manufacturers
instructions. A check valve and fullway-type shutoff valve shall be located
within the discharge line or internally within the device.
710.13.3
Venting. The plumbing
fixtures that discharge into the macerating device shall be vented in
accordance with this code. The sump shall be vented in accordance with the
manufacturers instructions and the vent shall be permitted to connect to the
fixture venting.
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