Louisiana Administrative Code
Title 51 - PUBLIC HEALTH-SANITARY CODE
Part XIV - Plumbing
Chapter 7 - Sanitary Drainage
Section XIV-723 - Fixture Units
Current through Register Vol. 50, No. 3, March 20, 2024
A. Values for Fixtures. Fixture unit values as given in Table 723.A of this code below designate the relative load weight of different kinds of fixtures which shall be employed in estimating the total load carried by a soil or waste pipe and shall be used in connection with the tables of sizes for soil, waste, and vent pipes for which the permissible load is given in terms of fixture units.
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Table 723.A Fixture Units Per Fixture or Group |
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Fixture Type |
Private |
Public |
Assembly |
Minimum Size of Trap (in) |
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Bathroom group consisting of a 1.6 GPF gravity tank, flushometer tank, or flushometer valve water closet, a small P.O. 1 1/4 lavatory, and a bathtub or shower or a combination bath/shower |
6.0 |
7.0 |
9.0 |
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Bathroom group consisting of a 1.6 GPF gravity tank, flushometer tank, or flushometer valve water closet, a large P.O. 1 1/2 lavatory, and a bathtub or shower or a combination bath/shower |
7.0 |
8.0 |
10.0 |
|
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Bathroom group consisting of a greater than 1.6 GPF gravity tank or flushometer valve water closet, a small P.O. 1 1/4 lavatory, and a bathtub or shower or a combination bath/shower |
7.0 |
9.0 |
11.0 |
|
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Bathroom group consisting of a greater than 1.6 GPF gravity tank or flushometer valve water closet, a large P.O. 1 1/2 lavatory, and a bathtub or shower or a combination bath/shower |
8.0 |
10.0 |
12.0 |
|
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Bathtub (with or without overhead shower) or whirlpool attachments (a showerhead over a bathtub or whirlpool bathtub attachments does not increase the fixture value) |
2.0 |
2.0 |
2 |
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Bidet |
1.0 |
1 1/4 |
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Bidet |
2.0 |
2.0 |
1 1/2 |
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Clothes Washer, domestic, standpipe |
3.0 |
3.0 |
3.0 |
2 |
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Clothes Washer, commercial, pumped waste |
See §723. B and 723.C of this code for methods of computing unit value of fixtures not listed in this table or for rating of devices with intermittent flows. |
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Clothes Washer, commercial, gravity waste |
See §723. B and 723.C of this code for methods of computing unit value of fixtures not listed in this table or for rating of devices with intermittent flows. |
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Combination sink and tray |
3.0 |
3.0 |
3.0 |
1 1/2 |
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Combination sink and tray with food disposal unit |
4.0 |
4.0 |
4.0 |
Separate traps 1 1/2 |
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Dental unit or cuspidor |
1.0 |
1.0 |
1 1/4 |
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Dental lavatory |
1.0 |
1 1/4 |
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Dishwashing machine, domestic (See §723. B and 723.C of this code for methods of computing unit value of fixtures not listed in this table or for rating of devices with intermittent flows) |
2.0 |
2.0 |
2.0 |
1 1/2 |
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Dishwashing machine, commercial |
See §723. B and 723.C of this code for methods of computing unit value of fixtures not listed in this table or for rating of devices with intermittent flows |
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Drinking Fountain |
0.5 |
0.5 |
1.0 |
1 1/4 |
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Floor drains (Size of floor drain trap shall be determined by the area of the floor to be drained; therefore, for larger trap sizes, see Table 723.B of this code to determine the applicable fixture unit value. If the floor drain receives continuous or semi-continuous flows, utilize §723. C of this code to determine the fixture unit value) |
1.0 |
2.0 |
2.0 |
2 |
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Hub drains (When the hub drain is utilized as a direct or an indirect waste receptor for a fixture, any fixture unit value otherwise assigned to the particular fixture draining into the hub drain shall be used. If the hub drain receives continuous or semi-continuous flows, utilize §723. C of this code to determine the fixture unit value) |
1.0 |
2.0 |
2.0 |
2 |
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Kitchen sink, domestic |
2.0 |
2.0 |
1 1/2 |
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Kitchen sink, domestic with food waste grinder and/or dishwasher |
3.0 |
3.0 |
1 1/2 |
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Lavatory (Lavatories with 1 1/4 or 1 1/2-inch trap have the same load value; larger punch out (P.O.) plugs for the drain hole have greater flow rate) |
1.0 |
1.0 |
1.0 |
Small P.O. 1 1/4 |
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Lavatory (Lavatories with 1 1/4 or 1 1/2-inch trap have the same load value; larger punch out (P.O.) plugs for the drain hole have greater flow rate) |
2.0 |
2.0 |
2.0 |
Large P.O. 1 1/2 |
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Lavatory, barber, beauty parlor |
2.0 |
2.0 |
2.0 |
1 1/2 |
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Lavatory, surgeon's |
2.0 |
1 1/2 |
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Laundry tray (1 or 2 compartments) |
2.0 |
2.0 |
2.0 |
1 1/2 |
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Mobile/Manufactured Home, trailer trap |
15.0 |
4 |
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Shower stall, domestic |
2.0 |
2.0 |
2.0 |
2 |
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Showers (group) per head (See §723. B and 723.C of this code for methods of computing unit value of fixtures not listed in this table or for rating of devices with intermittent flows) |
3.0 |
4.0 |
3 |
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Sinks |
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Bar, private, above grade |
1.0 |
1 1/2 |
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Clinical, 1.6 GPF |
6.0 |
6.0 |
3 |
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Clinical, greater than 1.6 GPF |
8.0 |
8.0 |
3 |
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Curbed Cleaning Facility |
3.0 |
3.0 |
3 |
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Floor, food service |
4.0 |
4.0 |
2 |
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Floor, bar service |
2.0 |
2.0 |
2 |
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Floor, other uses (See §723. B and 723.C of this code for methods of computing unit value of fixtures not listed in this table or for rating of devices with intermittent flows) |
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Pot, scullery, etc. (See §723. B and 723.C of this code for methods of computing unit value of fixtures not listed in this table or for rating of devices with intermittent flows) |
4.0 |
4.0 |
1 1/2 |
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Service (trap standard) |
3.0 |
3.0 |
3 |
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Service ("p" trap) |
2.0 |
2.0 |
2 |
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Surgeon's |
3.0 |
3.0 |
1 1/2 |
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Wash, (circular or multiple), normally used for hand washing, each set of faucets |
2.0 |
3.0 |
Nominal 1 1/2 |
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Wash, (circular or multiple), normally used for hand washing, no faucets (e.g., Superdome hand wash sinks in public toilet rooms) |
2.0 |
3.0 |
Nominal 1 1/2 |
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Travel Trailer, trailer trap |
6.0 |
4 |
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Urinals |
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Exposed trap |
2.0 |
2.0 |
5.0 |
1 1/2 |
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Pedestal, siphon jet, blowout, greater than 1.0 GPF |
6.0 |
8.0 |
10.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
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Wall lip, integral trap, 1.0 GPF |
2.0 |
2.0 |
5.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
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Wall lip, integral trap, greater than 1.0 GPF |
2.0 |
2.0 |
6.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
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Washout, greater than 1.0 GPF |
2.0 |
4.0 |
6.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
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Water Closets, |
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1.6 GPF Gravity Tank |
3.0 |
4.0 |
6.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
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1.6 GPF Flushometer Tank |
3.0 |
4.0 |
6.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
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1.6 GPF Flushometer Valve |
3.0 |
4.0 |
6.0 |
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greater than 1.6 GPF Gravity Tank |
4.0 |
6.0 |
8.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
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greater than 1.6 GPF Flushometer Valve |
4.0 |
6.0 |
8.0 |
Trap size shall be consistent with fixture type as defined in industry standards |
B. Fixtures Not Listed. Fixtures not listed in Table 723.A of this code above shall be estimated in accordance with Table 723.B of this code below.
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Table 723.B Fixtures Not Listed |
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Fixture Drain or Trap Size (in) |
Fixture-Unit Value |
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1 1/4 and smaller |
1 |
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1 1/2 |
2 |
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2 |
3 |
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3 |
5 |
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4 |
6 |
C. Values for Continuous Flow. For a continuous or semi continuous flow into a drainage system, such as from a pump, pump ejector, air conditioning equipment, or similar device, 2 fixture units shall be allowed for each gallon per minute (gpm) of flow (31.7 fixture units for each liter per second of flow).
D. Air Conditioning Units. The condensate or waste from an air conditioning unit shall be classified as a plumbing fixture only if connected to the plumbing system.
AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).
