Section 62-03.1-03-11 - Pumps and pump systems This section pertains to pumps installed after the septic tank. Sumps and ejectors installed before the septic tank must meet the requirements set forth in section 710.0 of the Uniform Plumbing Code.
1.Pumping chambers.a. The pumping chambers must be watertight and constructed of corrosion-resistant material. b. The working capacity of the pumping chamber must equal one-fourth of the daily sewage flow. Total capacity of the pumping chamber must equal or exceed daily sewage flow. c. A secure cover must be provided that is either bolted on or heavy enough to prevent unauthorized entry. d. An external electrical outlet must be provided for connection to the pump and control switches. Openings for wiring into the pump chamber must be sealed. e. No electrical splices or connections shall be located in the pump chamber or riser. 2.Pumps.a. Effluent lift pumps must be of cast bronze, cast iron, or plastic construction and must be designed for handling septic tank effluent. Pedestal sump pumps with an open motor are not allowed. b. Set the pump on a pedestal on the bottom of the pump chamber to minimize grit and solids entering the impeller. c. The pump must have maximum lift capability at least five feet [1.52 meters] greater than the actual elevation, plus pipe friction loss. A pump to a sewage mound ("Wisconsin mound") shall deliver seven and five-tenths gallons [28.38 liters] per minute for each one hundred square feet [9.29 square meters] of rock area. d. Outlet piping must be one and one-fourth inches [31.75 millimeters] in diameter or greater. The pipe must be laid below frostline or uniformly graded to drain back to the pump chamber. Volume of drain back should not exceed ten percent of the working capacity of the pump chamber. If piping is set to drain back, any check valves on the pump should be removed and a one-fourth-inch [6.35-millimeter] drainhole drilled on the low point of the outlet pipe. Piping connection to the pump must be with a union or quick disconnect coupling near the top of the pump chamber. 3.Pump controls.a. On-off switching for sewage pumps must be sealed mercury float switches or of a type approved by the administrative authority. b. Electrical connections must not be made in the pump chamber or pump chamber riser. N.D. Admin Code 62-03.1-03-11
General Authority: NDCC 43-18-09
Law Implemented: NDCC 43-18-09