TABLE 403.1 MINIMUM NUMBER OF REQUIRED PLUMBING …

1 TABLE MINIMUM NUMBER OF REQUIRED PLUMBING FIXTURES (See Sections and ) WATER CLOSETS (URINALS SEE SECTION ) LAVATORIES NO. CLASSIFICATION OCCUPANCY DESCRIPTION MALE FEMALE MALE FEMALE BATHTUBS/ SHOWERS DRINKING FOUNTAIN (SEE SECTION ) OTHER A-1 Theaters usually with fixed seats and other buildings for the performing arts and motion pictures 1 per 125 1 per 65 1 per 200 1 per 500 1 service sink A-2 Nightclubs, bars, taverns, dance halls and buildings for similar purposes 1 per 40 1 per 40 1 per 75 1 per 500 1 service sink Restaurants, banquet halls and food courts 1 per 75 1 per 75 1 per 200 1 per 500 1 service sink A-3 Auditoriums without permanent seating, art galleries, exhibition halls, museums, lecture halls, libraries, arcades and gymnasiums 1 per 125 1 per 65 1 per 200 1 per 500 1 service sink Passenger terminals and transportation facilities 1 per 500 1 per 500 1 per 750 1 per 1,000 1 service sink Places of worship and other religious services.

2 Churches without assembly halls 1 per 150 1 per 75 1 per 200 1 per 1,000 1 service sink A-4 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 1,500 and 1 per 60 for the remainder exceeding 1,500 1 per 200 1 per 150 1 per 1,000 1 service sink 1 Assembly (see Sections , and ) A-5 Stadiums, amusement parks, bleachers and grandstands for outdoor 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 1,500 and 1 per 60 for the remainder exceeding 1,500 1 per 200 1 per 150 1 per 1,000 1 service sink 2 Business (see Sections , and ) B Buildings for the transaction of business, professional services, other services involving merchandise, office buildings, banks, light industrial 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 50 and 1 per 80 for the remainder exceeding 50 1 per 100 3 Educational E/D Educational facilities 1 per 50 1 per 50 1 per 100 1 service sink 4 Factory and industrial F-1 and F-2 Structures in which occupants are engaged in work fabricating, assembly or processing of products or materials 1 per 100 1 per 100 (see Section 411 ) 1 per 400 1 service sink WATER CLOSETS (URINALS SEE SECTION ) LAVATORIES NO.

3 CLASSIFICATION OCCUPANCY DESCRIPTION MALE FEMALE MALE FEMALE BATHTUBS/ SHOWERS DRINKING FOUNTAIN (SEE SECTION ) OTHER I-1 Residential care 1 per 10 1 per 10 1 per 8 1 per 100 1 service sink Hospitals, ambulatory nursing home patients b 1 per room c 1 per room c 1 per 15 1 per 100 1 service sink per floor Employees, other than residential care b 1 per 25 1 per 35 1 per 100 I-2 Visitors, other than residential care 1 per 75 1 per 100 1 per 500 I-3 Prisons b 1 per cell 1 per cell 1 per 15 1 per 100 1 service sink I-3 Reformitories, detention centers, and correctional centers b 1 per 15 1 per 15 1 per 15 1 per 100 1 service sink 5 Institutional I-4 Adult daycare and childcare b 1 per 15 1 per 15 1 per 15 d 1 per 100 1 service sink 6 Mercantile (see Sections , and )

4 F,g M Retail stores, service stations, shops, salesrooms, markets and shopping centers 1 per 500 1 per 750 1 per 1,000 7 Residential R-1 Hotels, motels, boarding houses 1 per guestroom 1 per guestroom 1 per guestroom 1 service sink (transient) R-2 Dormitories, fraternities, sororities and boarding houses (not transient) 1 per 10 1 per 10 1 per 8 1 per 100 1 service sink R-2 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 e R-3 One- and two-family dwellings 1 per dwelling unit 1 per dwelling unit 1 per dwelling unit 1 kitchen sink per dwelling unit; 1 automatic clothes washer connector per dwelling unit e R-4 Residential care/assisted living facilities 1 per 10 1 per 10 1 per 8 1 per 100 1 service sink 8 Storage (see Sections and ) S-1 S-2 Structures for the storage of goods, warehouses, storehouse and freight depots.

5 Low and Moderate Hazard. 1 per 100 1 per 100 See Section 411 1 per 1,000 1 service sink TABLE MINIMUM SIZES OF FIXTURE WATER SUPPLY PIPES FIXTURE MINIMUM PIPE SIZE (inch) Bathtubs a (60" x 32" and smaller Bathtubs a (larger than 60" x 32") Bidet 3 / 8 Combination sink and tray Dishwasher, domestic a Drinking fountain 3 / 8 Hose bibbs Kitchen sink a Laundry, 1, 2 or 3 compartments a Lavatory 3 / 8 Shower, single head a Sinks, flushing rim Sinks, service Urinal, flush tank Urinal, flush valve Wall hydrant Water closet, flush tank 3 / 8 Water closet, flush valve 1 Water closet, flushometer tank 3 / 8 Water closet, one piece a TABLE MINIMUM WATER SERVICE SIZE a NO. OF FIXTURE UNITS FLUSH TANK WC b DIAMETER OF WATER PIPE c RECOMMENDED METER SIZE (inches) d APPROX.)

6 PRESSURE LOSS METER + 100 PIPE (psi) e NO. OF FIXTURE UNITS FLUSH VALVE WC b 18 5 / 8 30 19-55 1 1 1 1 30 30 9 56-58 - 1 1 1 1 30 30 10-20 86-225 1 1 1 1 30 30 21-77 226-350 2 2 1 1 30 30 78-175 351-550 2 2 2 2 30 30 176-315 551-640 2 2 2 2 30 30 316-392 641-1340 3 3 3 3 22 22 393-940 TABLE DRAINAGE FIXTURE UNITS FOR FIXTURES AND GROUPS FIXTURE TYPE DRAINAGE FIXTURE UNITVALUE AS LOAD FACTORS MINIMUM SIZE OF TRAP (inches) Automatic clothes washers, commercial a,g 3 2 Automatic clothes washers, residential g 2 2 Bathroom group as defined in Section 202 ( gpf water closet) f 5 Bathroom group as defined in Section 202 (water closet flushing greater than gpf) f 6 Bathtub b (with or without overhead shower or whirpool attachments) 2 1 Bidet 1 1 Combination sink and tray 2 1 Dental lavatory 1 1 Dental unit or cuspidor 1 1 Dishwashing machine, c domestic 2 1 Drinking fountain 1 Emergency floor drain 0 2 Floor drains 2 2 Kitchen sink, domestic 2 1 Kitchen sink, domestic with food waste grinder and/or dishwasher 2 1 Laundry tray (1 or 2 compartments) 2 1 Lavatory 1 1 Shower 2 1 Sink 2 1 Urinal 4 Note d Urinal, 1 gallon per flush or less 2 e Note d Wash sink (circular or multiple) each set of faucets 2 1 Water closet, flushometer tank, public or private 4 e Note d Water closet, private ( gpf) 3 e Note d Water closet, private (flushing greater than gpf)

7 4 e Note d Water closet, public ( gpf) 4 e Note d Water closet, public (flushing greater than gpf) 6 e Note d TABLE (2) HORIZONTAL FIXTURE BRANCHES AND STACKS a MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS (dfu) Stacks b DIAMETER OF PIPE (inches) Total for horizontal branch Total discharge into one branch interval Total for stack of three branch Intervals or less Total for stack greater than three branch intervals 1 3 2 4 8 2 6 6 10 24 2 12 9 20 42 3 20 20 48 72 4 160 90 240 500 5 360 200 540 1,100 6 620 350 960 1,900 8 1,400 600 2,200 3,600 10 2,500 1,000 3,800 5,600 12 2,900 1,500 6,000 8,400 15 7,000 Note c Note c Note c TABLE (1) BUILDING DRAINS AND SEWERS MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS CONNECTED TO ANY PORTION OF THE BUILDING DRAIN OR THE BUILDING SEWER, INCLUDING BRANCHES OF THE BUILDING DRAIN a Slope per foot DIAMETER OF PIPE (inches) 1/ 16 inch 1/ 8 inch inch inch 1 1 1 1 3 3 2 21 26 2 24 31 3 36 42 50 4 180 216 250 5 390 480 575 6 700 840 1,000 8 1,400 1,600 1,920 2,300 10 2,500 2,900 3,500 4,200 12 3,900 4,600 5,600 6,700 15 7,000 8,300 10,000 12,000