Assigned fixture unit values.
Omaha Municipal Code § 49-901
in effectSec. 49-901. - Assigned fixture unit values.
Fixture unit values listed in Table 49-901 list the relative anticipated volume rating for each type of fixture. These values shall be employed to calculate the estimated volume carried by soil and waste pipe.
Fixtures not listed in Table 49-901 shall be rated on the basis of discharge to the soil or waste system. (See Table 49-907(d).)
Table 49-901
Fixture | Trap Size (inches) | Branch (inches) | Fixture Unit
Bar sink:
Residential | See Note 8 | 1¼ | 1¼ | 1
Commercial w/ four compartments | 1½ | 1½ | 2
Bathtub | 1½ | 1½ | 2
Beer taps | See Note 1 | 1¼ | 1¼ | 1
Bidets | 1½ | 1½ | 2
Cuspidors | 1¼ | 1¼ | 1
Dental units | 1¼ | 1¼ | 1
Disposal:
Residential | 1½ | 1½ | 2
Commercial w/ two-inch trap | See Note 7 | 2 | 2 | 2
Commercial w/ three-inch trap | See Note 7 | 3 | 3 | 3
Drinking fountain | 1¼ | 1¼ | 1
Dishwasher:
Residential | See Note 2 | 1½ | 1½ | 2
Commercial
Single rack | See Note 2 | 2 | 2 | 2
Conveyor type | 3 | 3 | 3
Floor drain | See Note 10 | See Note 10 | See Note 10 | See Note 10
Floor sink | See Note 10
Flushing rim sink | 3 | 3 | 6
Glass washer | 1½ | 1½ | 2
Laundry sink | 1½ | 1½ | 2
Lavatory (basin) | 1¼ | 1¼ | 1
Mop sink (floor outlet):
two-inch | 2 | 2 | 2
three-inch | 3 | 3 | 3
Pedicure foot bath | 1½ | 1½ | 2
Service sink:
With a two-inch trap standard | 2 | 2 | 2
With a three-inch trap standard | 3 | 3 | 3
Shower stall | See Note 6 | 2 | 2 | 2
Sink-residential (Kitchen) W/dishwasher/ disposal | 1½ | 1½ | 2
Sink—commercial two- or three-compartment | 2 | 2 | 3
Sink—commercial pot | 1½ | 1½ | 2
Sitz bath | 1½ | 1½ | 2
Shampoo sink | 1½ | 1½ | 2
Urinals:
Floor urinal | 2 | 2 | 2
Pedestal urinals | 3 | 3 | 6
Wall urinal (exposed trap) | See Note 3 | 1½ | 1½ | 2
Wall urinal (integral trap) | 2 | 2 | 2
Trough urinal | See Note 4
Water closet
Residential | 3 | 3 | 3
Commercial | 3 | 3 | 4
Places of assembly and establishments serving liquor | 3 | 3 | 6
Wash fountains circular | 2 | 2 | 2
Wash fountains— ¼ and ½ circular with multiple water sprays | See Note 9 | 1½ | 1½ | 2
Washers, clothes:
Residential | See Note 5 | 2 | 2 | 3
Commercial (pump) | See Note 5 | 2 | 2 | 3
Commercial (gravity) | 4 | 4 | 6
Additional criteria are as follows:
Note 1: Beer taps should be run indirect when possible (see section 49-1013).
Note 2: See section 49-606.
Note 3: Repair and replacement of existing fixture only.
Note 4: Plumbing board approval required.
Note 5: Clothes washers in groups of three or more shall be rated at six units each for the purpose of common waste pipe sizing.
Note 6: Refer to section 49-622 for further specifications.
Note 7: Disposals shall not be installed in a commercial kitchen (see section 49-613).
Note 8: A bar sink with a 3½ inch diameter strainer will be rated as two fixture units and shall have a minimum 1½-inch waste opening.
Note 9: Wash fountains, either one-quarter or one-half circular with multiple water sprays shall have a rating equal to 0.5 fixture unit for each water spray, but no less than one fixture unit.
Note 10: Floor drains and floor sinks shall have a fixture rating base on the size of the drain outlet. When the floor drain or floor sink is used to receives the discharge from an indirect waste, the rating shall be based on the discharge of the discharging fixture.
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(Ord. No. 40524, § 1, 10-20-15)
Source: City of Omaha, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ne/omaha/codes/code_of_ordinances?nodeId=OMMUCOCHGEORVOII_CH49PL_ARTIXSOWAPI_DIV1GE_S49-901ASFIUNVAFetched: 10/28/2026