Exception: The installation of paper dispensers or accessibility grab bars shall not be considered obstructions.
Wall-mounted water closet fixtures shall be securely bolted to an approved carrier fitting. The connecting pipe between the carrier fitting and the fixture shall be an approved material and designed to accommodate an adequately sized gasket. Gasket material shall be neoprene, felt, or similar approved types.
Caulked-on closet rings (closet flanges) shall be not less than 1/4 of an inch (6.4 mm) thick and not less than 2 inches (51 mm) in overall depth.
Closet rings (closet flanges) shall be burned or soldered to lead bends or stubs, shall be caulked to cast-iron soil pipe, shall be solvent cemented to ABS and PVC, and shall be screwed or fastened in an approved manner to other materials.
Closet bends or stubs shall be cut-off to present a smooth surface even with the top of the closet ring before the rough inspection is called.
Closet rings (closet flanges) shall be adequately designed and secured to support fixtures connected thereto.
- Chemical stoneware
- Copper-based alloy
- Nickel-based alloy
- Corrosion-resistant steel
- Other materials suited for the intended use of the fixture
Gang showers, where supplied with a single temperature-controlled water supply pipe, shall be controlled by a mixing valve that complies with ASSE 1069. Handle position stops shall be provided on such valves and shall be adjusted per the manufacturer's instructions to deliver maximum mixed water setting of 120°F (49°C). Water heater thermostats shall not be considered a suitable control for meeting this provision.
Thresholds shall be of sufficient width to accommodate a minimum 22 inch (559 mm) door. Shower doors shall open so as to maintain not less than a 22 inch (559 mm) unobstructed opening for egress. The immediate adjoining space to showers without thresholds shall be considered a wet location and shall comply with the requirements of the building, residential, and electrical codes.
Shower receptors shall have the subfloor and rough side of walls to a height of not less than 3 inches (76 mm) above the top of the finished dam or threshold shall be first lined with sheet plastic, lead, or copper, or shall be lined with other durable and watertight materials. Showers that are provided with a built in place, permanent seat or seating area that is located within the shower enclosure, shall be first lined with sheet plastic, lead, copper, or shall be lined with other durable and watertight materials that extend not less than 3 inches (76 mm) above horizontal surfaces of the seat or the seating area.
Lining materials shall be pitched 1/4 inch per foot (20.8 mm/m) to weep holes in the subdrain of a smooth and solidly formed subbase. Such lining materials shall extend upward on the rough jambs of the shower opening to a point not less than 3 inches (76 mm) above the horizontal surfaces of the seat or the seating area, the top of the finished dam or threshold and shall extend outward over the top of the permanent seat, permanent seating area, or rough threshold and be turned over and fastened on the outside face of both the permanent seat, permanent seating area, or rough threshold and the jambs.
Nonmetallic shower subpans or linings shall be permitted to be built up on the job site of not less than three layers of standard grade 15 pound (6.8 kg) asphalt impregnated roofing felt. The bottom layer shall be fitted to the formed subbase and each succeeding layer thoroughly hot-mopped to that below. Corners shall be carefully fitted and shall be made strong and watertight by folding or lapping, and each corner shall be reinforced with suitable webbing hot-mopped in place.
Folds, laps, and reinforcing webbing shall extend not less than 4 inches (102 mm) in all directions from the corner, and webbing shall be of approved type and mesh, producing a tensile strength of not less than 50 pounds per square foot (lb/flt2) (244 kg/m2) in either direction. Nonmetallic shower subpans or linings shall be permitted to consist of multilayers of other approved equivalent materials suitably reinforced and carefully fitted in place on the job site as elsewhere required in this section.
Linings shall be properly recessed and fastened to the approved backing so as not to occupy the space required for the wall covering, and shall not be nailed or perforated at a point that is less than 1 inch (25.4 mm) above the finished dam or threshold. An approved type subdrain shall be installed with a shower subpan or lining. Each such subdrain shall be of the type that sets flush with the subbase and shall be equipped with a clamping ring or other device to make a tight connection between the lining and the drain. The subdrain shall have weep holes into the waste line. The weep holes located in the subdrain clamping ring shall be protected from clogging.
Whirlpool pump access located in the crawl space shall be located not more than 20 feet (6096 mm) from an access door, trap door, or crawl hole.
The pump and the circulation piping shall be self-draining to minimize water retention. Suction fittings on whirlpool bathtubs shall comply with ASME A112.19.7/CSA B45.10.
- Toilet rooms containing two or more water closets or a combination of one water closet and one urinal, except in a dwelling unit.
- Commercial kitchens and in accordance with Section 704.3.
- Laundry rooms in commercial buildings and common laundry facilities in multi-family dwelling buildings.
- Boiler rooms.
Indirect drains shall be permitted to be located in freezers or other spaces where freezing temperatures are maintained, provided that traps, where supplied, shall be located where the seal will not freeze. Otherwise, the floor of the freezer shall be sloped to a floor drain located outside of the storage compartment.
- Clinical sinks
- Laundry trays
- Service sinks
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 2902.1, Minimum Number of Required Plumbing Fixtures of the 2018 International Building Code shall be applied to determine the minimum number of plumbing fixtures required. Where applying the fixture ratios in Table 2902.1, Minimum Number of Required Plumbing Fixtures of the 2018 International Building Code 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.
[P] TABLE 2902.1
MINIMUM NUMBER OF REQUIRED PLUMBING FIXTURESa (See Sections 2902.1.1 and 2902.2)
SECTION 424.2 OF THE
INTERNATIONAL PLUMBING CODE)
(SEE SECTION 410
INTERNATIONAL PLUMBING CODE)
|1||Assembly||Theaters and other buildings for the performing arts and motion picturesd||1 per 125||1 per 65||1 per 200||—||1 per 500||1 service sink|
|Nightclubs, bars, taverns, dance halls and buildings for similar purposesd||1 per 40||1 per 40||1 per 75||—||1 per 500||1 service sink|
|Restaurants, banquet halls and food courtsd||1 per 75||1 per 75||1 per 200||—||1 per 500||1 service sink|
|Casino gaming areas||1 per 100 for the first 400 and 1 per 250 for the remainder exceeding 400||1 per 50 for the first 400 and 1 per 150 for the remainder exceeding 400||1 per 250 for the first 750 and 1 per 500 for the remainder exceeding 750||—||1 per 1,000||1 service sink|
|Auditoriums without permanent seating, art galleries, exhibition halls, museums, lecture halls, libraries, arcades and gymnasiumsd||1 per 125||1 per 65||1 per 200||—||1 per 500||1 service sink|
|Passenger terminals and transportation facilitiesd||1 per 500||1 per 500||1 per 750||—||1 per 1,000||1 service sink|
|Places of worship and other religious servicesd||1 per 150||1 per 75||1 per 200||—||1 per 1,000||1 service sink|
|Coliseums, arenas, skating rinks, pools and tennis courts for indoor sporting events and activities||1 per 75 for the first 1,500 and 1 per 120 for the remainder exceeding 1,500||1 per 40 for the first 1,520 and 1 per 60 for the remainder exceeding 1,520||1 per 200||1 per 150||—||1 per 1,000||1 service sink|
|Stadiums, amusement parks, bleachers and grandstands for outdoor sporting events and activitiesf||1 per 75 for the first 1,500 and 1 per 120 for the remainder exceeding 1,500||1 per 40 for the first 1,520 and 1 per 60 for the remainder exceeding 1,520||1 per 200||1 per 150||—||1 per 1,000||1 service sink|
|2||Business||Buildings for the transaction of business, professional services, other services involving merchandise, office buildings, banks, light industrial, ambulatory care and similar uses||1 per 25 for the first 50 and 1 per 50 for the remainder exceeding 50||1 per 40 for the first 80 and 1 per 80 for the remainder exceeding 80||—||1 per 100||1 service sinke|
|3||Educational||Educational facilities||1 per 50||1 per 50||—||1 per 100||1 service sink|
|4||Factory and industrial||Structures in which occupants are engaged in work fabricating, assembly or processing of products or materials||1 per 100||1 per 100||—||1 per 400||1 service sink|
|5||Institutional||Custodial care facilities||1 per 10||1 per 10||1 per 8||1 per 100||1 service sink|
|Medical care recipients in hospitals and nursing homesb||1 per roomc||1 per roomc||1 per 15||1 per 100||1 service sink|
|Employees in hospitals and nursing homesb||1 per 25||1 per 35||—||1 per 100||—|
|Visitors in hospitals and nursing homes||1 per 75||1 per 100||—||1 per 500||—|
|Prisonsb||1 per cell||1 per cell||1 per 15||1 per 100||1 service sink|
|Reformatories, detention centers and correctional centersb||1 per 15||1 per 15||1 per 15||1 per 100||1 service sink|
|Employees in reformitories, detention centers and correctional centersb||1 per 25||1 per 35||—||1 per 100||—|
|Adult day care and child day care||1 per 15||1 per 15||1||1 per 100||1 service sink|
|6||Mercantile||Retail stores, service stations, shops, salesrooms, markets and shopping centers||1 per 500||1 per 750||—||1 per 1,000||1 service sinke|
|7||Residential||Hotels, motels, boarding houses (transient)||1 per sleeping unit||1 per sleeping unit||1 per sleeping unit||—||1 service sink|
|Dormitories, fraternities, sororities and boarding houses (not transient)||1 per 10||1 per 10||1 per 8||1 per 100||1 service sink|
|Apartment house||1 per dwelling unit||1 per dwelling unit||1 per dwelling unit||—||1 kitchen sink per dwelling unit; 1 automatic clothes washer connection per 20 dwelling units|
|One- and two-family dwellings and lodging houses with five or fewer guestrooms||1 per dwelling unit||1 per 10||1 per dwelling unit||—||1 kitchen sink per dwelling unit; 1 automatic clothes washer connection per dwelling unit|
|Congregate living facilities with 16 or fewer persons||1 per 10||1 per 10||1 per 8||1 per 100||1 service sink|
|8||Storage||Structures for the storage of goods, warehouses, storehouses and freight depots, low and moderate hazard||1 per 100||1 per 100||—||1 per 1,000||1 service sink|
- The fixtures shown are based on one fixture being the minimum required for the number of persons indicated or any fraction of the number of persons indicated. The number of occupants shall be determined by this code.
- Toilet facilities for employees shall be separate from facilities for inmates or care recipients.
- A single-occupant toilet room with one water closet and one lavatory serving not more than two adjacent patient sleeping units shall be permitted, provided that each patient sleeping unit has direct access to the toilet room and provisions for privacy for the toilet room user are provided.
- The occupant load for seasonal outdoor seating and entertainment areas shall be included when determining the minimum number of facilities required.
- For business and mercantile classifications with an occupant load of 15 or fewer, a service sink shall not be required.
- The required number and type of plumbing fixtures for outdoor swimming pools shall be in accordance with Section 609 of the International Swimming Pool and Spa Code.
- Residential installations.
- In occupancies with a total occupant load of 10 or less, including customers and employees, one toilet facility, designed for use by no more than one person at a time, shall be permitted for use by both sexes.
- In business and mercantile occupancies with a total occupant load of 50 or less including customers and employees, one toilet facility, designed for use by no more than one person at a time, shall be permitted for use by both sexes.
Required toilet facilities for employees and customers located in shopping malls or centers shall be permitted to be met by providing a centrally located toilet facility accessible to several stores. The maximum travel distance from entry to any store to the toilet facility shall not exceed 300 feet (91 440 mm).
Required toilet facilities for employees and customers in other than shopping malls or centers shall have a maximum travel distance not to exceed 500 feet (152 m).