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422.1 Fixture Count

Hawaii Plumbing Code 2021 > 4 Plumbing Fixtures and Fixture Fittings > 422.0 Minimum Number of Required Fixtures > 422.1 Fixture Count
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Plumbing fixtures shall be provided for the type of building occupancy and in the minimum number shown in Table 422.1. The total occupant load and occupancy classification shall be determined in accordance with the building code. Occupancy classification not shown in Table 422.1 shall be considered separately by the Authority Having Jurisdiction.
The minimum number of fixtures shall be calculated at 50 percent male and 50 percent female based on the total occupant load. Where information submitted indicates a difference in the distribution of the sexes such information shall be used to determine the number of fixtures for each sex. Once the occupancy load and occupancy are determined, Table 422.1 shall be applied to determine the minimum number of plumbing fixtures required. Where applying the fixture ratios in Table 422.1 results in fractional numbers, such numbers shall be rounded to the next whole number. For multiple occupancies, fractional numbers shall be first summed and then rounded to the next whole number.
TABLE 422.1
MINIMUM PLUMBING FACILITIES1
Each building shall be provided with sanitary facilities, including provisions for persons with disabilities as prescribed by the Department Having Jurisdiction. Table 422.1 applies to new buildings, additions to a building, and changes of occupancy or type in an existing building resulting in increased occupant load.
TYPE OF OCCUPANCY2 WATER CLOSETS (FIXTURES PER PERSON)3 URINALS (FIXTURES PER PERSON)4 LAVATORIES (FIXTURES PER PERSON)5 BATHTUBS OR SHOWERS (FIXTURES PER PERSON) DRINKING FOUNTAINS/FACILITIES (FIXTURES PER PERSON) OTHER
A-1 Assembly occupancy (fixed or permanent seating)- theaters, concert halls, and auditoriums Male
1: 1-100
2: 101-200
3: 201-400		 Female
1: 1-25
2: 26-50
3: 51-100
4: 101-200
6: 201-300
8: 301-400		 Male
1: 1-200
2: 201-300
3: 301-400
4: 401-600		 Male
1: 1-200
2: 201-400
3: 401-600
4: 601-750		 Female
1: 1-100
2: 101-200
4: 201-300
5: 301-500
6: 501-750		 — 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 500 males and 1 fixture for each additional 125 females. Over 600, add 1 fixture for each additional 300 males. Over 750, add 1 fixture for each additional 250 males and 1 fixture for each additional 200 females. Over 750, add 1 fixture for each additional 500 persons.
A-2 Assembly occupancy- restaurants, pubs, lounges, nightclubs and banquet halls Male
1: 1-50
2: 51-150
3: 151-300
4: 301-400		 Female
1: 1-25
2: 26-50
3: 51-100
4: 101-200
6: 201-300
8: 301-400		 Male
1: 1-200
2: 201-300
3: 301-400
4: 401-600		 Male
1: 1-150
2: 151-200
3: 201-400		 Female
1: 1-150
2: 151-200
4: 201-400		 — 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 250 males and 1 fixture for each 125 females. Over 600, add 1 fixture for each additional 300 males. Over 400, add 1 fixture for each additional 250 males and 1 fixture for each additional 200 females Over 750, add 1 fixture for each additional 500 persons.
A-3 Assembly occupancy (typical without fixed or permanent seating)- arcades, places of worship, museums, libraries, lecture halls, gymnasiums (without spectator seating), indoor pools (without spectator seating) Male
1: 1-100
2: 101-200
3: 201-400		 Female
1: 1-25
2: 26-50
3: 51-100
4: 101-200
6: 201-300
8: 301-400		 Male
1: 1-100
2: 101-200
3: 201-400
4: 401-600		 Male
1: 1-200
2: 201-400
3: 401-600
4: 601-750		 Female
1: 1-100
2: 101-200
4: 201-300
5: 301-500
6: 501-750		 — 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 500 males and 1 fixture for each additional 125 females. Over 600, add 1 fixture for each additional 300 males. Over 750, add 1 fixture for each additional 250 males and 1 fixture for each additional 200 females. Over 750, add 1 fixture for each additional 500 persons.
A-4 Assembly occupancy (indoor activities or sporting events with spectator seating)- swimming pools, skating rinks, arenas, and gymnasiums Male
1: 1-100
2: 101-200
3: 201-400		 Female
1: 1-25
2: 26-50
3: 51-100
4: 101-200
6: 201-300
8: 301-400		 Male
1: 1-100
2: 101-200
3: 201-400
4: 401-600		 Male
1: 1-200
2: 201-400
3: 401-750		 Female
1: 1-100
2: 101-200
4: 201-300
5: 301-500
6: 501-750		 — 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 500 males and 1 fixture for each additional 125 females. Over 600, add 1 fixture for each additional 300 males. Over 750, add 1 fixture for each additional 250 males and 1 fixture for each additional 200 females. Over 750, add 1 fixture for each additional 500 persons.
A-5 Assembly occupancy (outdoor activities or sporting events)- amusement parks, grandstands and stadiums Male
1: 1-100
2: 101-200
3: 201-400		 Female
1: 1-25
2: 26-50
3: 51-100
4: 101-200
6: 201-300
8: 301-400		 Male
1: 1-100
2: 101-200
3: 201-400
4: 401-600		 Male
1: 1-200
2: 201-400
3: 401-750		 Female
1: 1-100
2: 101-200
4: 201-300
5: 301-500
6: 501-750		 — 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 500 males and 1 fixture for each additional 125 females. Over 600, add 1 fixture for each additional 300 males. Over 750, add 1 fixture for each additional 250 males and 1 fixture for each additional 200 females. Over 750, add 1 fixture for each additional 500 persons.
B Business occupancy (office, professional or service type transactions)- banks, vet clinics, hospitals, car wash, banks, beauty salons, ambulatory health care facilities, laundries and dry cleaning, educational institutions (above high school), or training facilities not located within school, post offices and printing shops Male
1: 1-50
2: 51-100
3: 101-200
4: 201-400		 Female
1: 1-15
2: 16-30
3: 31-50
4: 51-100
8: 101-200
11: 201-400		 Male
1: 1-100
2: 101-200
3: 201-400
4: 401-600		 Male
1: 1-75
2: 76-150
3: 151-200
4: 201-300
5: 301-400		 Female
1: 1-50
2: 51-100
3: 101-150
4: 151-200
5: 201-300
6: 301-400		 — 1 per 150 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 500 males and 1 fixture for each additional 150 females. Over 600, add 1 fixture for each additional 300 males. Over 400, add 1 fixture for each additional 250 males and 1 fixture for each additional 200 females.
E Educational occupancy- private or public schools Male
1 per 50		 Female
1 per 30		 Male
1 per 100		 Male
1 per 40		 Female
1 per 40		 — 1 per 150 1 service sink or laundry tray
F1, F2 Factory or Industrial occupancy-fabricating or assembly work Male
1: 1-50
2: 51-75
3: 76-100		 Female
1: 1-50
2: 51-75
3: 76-100		 — Male
1: 1-50
2: 51-75
3: 76-100		 Female 1: 1-50
2: 51-75
3: 76-100		 1 shower for each 15 persons exposed to excessive heat or to skin contamination with poisonous, infectious or irritating material 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 100, add 1 fixture for each additional 40 persons. — Over 100, add 1 fixture for each additional 40 persons. Over 750, add 1 fixture for each additional 500 persons.
I-1 Institutional occupancy (houses more than 16 persons on a 24-hour basis)- substance abuse centers, assisted living, group homes, or residential facilities Male
1 per 15		 Female
1 per 15		 — Male
1 per 15		 Female
1 per 15		 1 per 8 1 per 150 1 service sink or laundry tray
I-2 Institutional occupancy-medical, psychiatric, surgical or nursing homes Hospitals and nursing homes-individual rooms and ward room 1 per room — 1 per room 1 per room 1 per 150 1 service sink or laundry tray
1 per 8 patients — 1 per 10 patients 1 per 20 patients
Hospital Waiting or Visitor Rooms 1 per room — 1 per room — 1 per room —
Employee Use Male
1: 1-15
2: 16-35
3: 36-55		 Female
1: 1-15
3: 16-35
4: 36-55		 — Male
1 per 40		 Female
1 per 40		 — — —
Over 55, add 1 fixture for each additional 40 persons.
I-3 Institutional occupancy (houses more than 5 people) Prisons 1 per cell — 1 per cell 1 per 20 1 per cell block/floor —
Correctional facilities or juvenile center 1 per 8 — 1 per 10 1 per 8 1 per floor 1 service sink or laundry tray
Employee Use Male
1: 1-15
2: 16-35
3: 36-55		 Female
1: 1-15
3: 16-35
4: 36-55		 — Male
1 per 40		 Female
1 per 40		 — 1 per 150 —
Over 55, add 1 fixture for each additional 40 persons.
I-4 Institutional occupancy (any age that receives care for less than 24 hours) Male
1: 1-15
2: 16-35
3: 36-55		 Female
1: 1-15
3: 16-35
4: 36-55		 — Male
1 per 40		 Female
1 per 40		 — 1 per 150 1 service sink or laundry tray
Over 55, add 1 fixture for each additional 40 persons.
M Mercantile occupancy (the sale of merchandise and accessible to the public) Male
1: 1-100
2: 101-200
3: 201-400		 Female
1: 1-100
2: 101-200
4: 201-300
6: 301-400		 Male
0: 1-200
1: 201-400		 Male
1: 1-200
2: 201-400		 Female
1: 1-200
2: 201-300
3: 301-400		 — 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 500 males and 1 fixture for each 200 females. Over 400, add 1 fixture for each additional 500 males. Over 400, add 1 fixture for each additional 500 males and 1 fixture for each 400 females. — Over 750, add 1 fixture for each additional 500 persons. —
R-1 Residential occupancy (minimal stay)- hotels, motels, bed and breakfast homes 1 per sleeping room — 1 per sleeping room 1 per sleeping room — 1 service sink or laundry tray
R-2 Residential occupancy (long-term or permanent) Dormitories Male
1 per 10		 Female
1 per 8		 Male
1 per 25		 Male
1 per 12		 Female
1 per 12		 1 per 8 1 per 150 1 service sink or laundry tray
Add 1 fixture for each additional 25 males and 1 fixture for each additional 20 females. Over 150, add 1 fixture for each additional 50 males. Add 1 fixture for each additional 20 males and 1 fixture for each additional 15 females.
Employee Use Male
1: 1-15
2: 16-35
3: 36-55		 Female
1: 1-15
3: 16-35
4: 36-55		 — Male
1 per 40		 Female
1 per 40		 — —
Over 55, add 1 fixture for each additional 40 persons
Apartment house/unit 1 per apartment — 1 per apartment 1 per apartment — 1 kitchen sink per apartment. 1 laundry tray or 1 automatic clothes washer connection per unit or 1 laundry tray or 1 automatic clothes washer connection for each 12 units
R-3 Residential occupancy (long-term or permanent in nature) for more than 5 but does not exceed 16 occupants) Male
1 per 10		 Female
1 per 8		 — Male
1 per 12		 Female
1 per 12		 1 per 8 1 per 150 1 service sink or laundry tray
Add 1 fixture for each additional 25 males and 1 fixture for each additional 20 females. Add 1 fixture for each additional 20 males and 1 fixture for each additional 15 females.
R-3 Residential occupancy (one and two family dwellings) 1 per one and two family dwelling — 1 per one and two family dwelling 1 per one and two family dwelling — 1 kitchen sink and 1 automatic clothes washer connection per one and two family dwelling
R-4 Residential occupancy (residential care or assisted living) Male
1 per 10		 Female
1 per 8		 — Male
1 per 12		 Female
1 per 12		 1 per 8 1 per 150 1 service sink or laundry tray
Add 1 fixture for each additional 25 males and 1 fixture for each additional 20 females. Add 1 fixture for each additional 20 males and 1 fixture for each additional 15 females.
S-1, S-2 Storage occupancy-storage of goods, warehouse, aircraft hanger, food products, appliances Male 1: 1-100
2: 101-200
3: 201-400		 Female
1: 1-100
2: 101-200
3: 201-400		 — Male
1: 1-200
2: 201-400 3: 401-750		 Female
1: 1-200
2: 201-400 3: 401-750		 — 1: 1-250
2: 251-500
3: 501-750		 1 service sink or laundry tray
Over 400, add 1 fixture for each additional 500 males and 1 fixture for each additional 150 females. Over 750, add 1 fixture for each additional 500 persons. Over 750, add 1 fixture for each additional 500 persons.
Notes:
1 The figures shown are based upon one fixture being the minimum required for the number of persons indicated or any fraction thereof.
2 A restaurant is defined as a business that sells food to be consumed on the premises.
  1. The number of occupants for a drive-in restaurant shall be considered as equal to the number of parking stalls.
  2. Hand-washing facilities shall be available in the kitchen for employees.
3 The total number of required water closets for females shall be not less than the total number of required water closets and urinals for males.
4 For each urinal added in excess of the minimum required, one water closet shall be permitted to be deducted. The number of water closets shall not be reduced to less than two-thirds of the minimum requirement.
5 Metering or self-closing faucets shall be installed on lavatories intended to serve the transient public.
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