System Sizing Tables - by Nelsen Corporation

The following information lists estimated water usage for various establishments. Remember that these are only estimates.

Type of Establishment

Gallons/Day

 

Airports (per passenger)

Apartments, Multi Family (per resident)

Camps:

Construction, semipermanent (per worker)

Day with no meals served  (per camper)

Resorts, day and night with limited plumbing (per camper)

Tourist with central bath and toilet facilities (per person)

Cottages with seasonal occupancy (per resident)

Country Clubs (per non-resident member)

Dwellings:

Boarding houses (per boarder)

Luxury ( per person)

Multiple family apartments (per resident)

Rooming houses (per resident)

Single family (per resident)

Factories (gal per person per shift)

Hotels with private baths (two persons/room)

Hotels without private baths (per person)

Hospitals (per bed)

Laundries, self-service (gallons/washing/customer)

Motel with bath, toilet and kitchen (per bed space)

Motels with bed and toilet - no kitchen (per bed space)

Parks:

Overnight with flush toilets (per camper)

Trailers with individual bath units (per camper)

Picnic Areas:

With bath houses, showers and flush toilets (per picnicker)

With toilet facilities only (gallon/picnicker)

Restaurants with toilet facilities (per patron)

Restaurants with bars and cocktail lounge (add per person)

Schools:

Boarding (per person)

Day with cafeteria, gymnasium and showers (per pupil)

Day without cafeteria, gymnasium or shower (per pupil)

Service stations (per vehicle)

Stores (per toilet room)

Swimming pools (per swimmer)

Theaters:  Indoor or Drive-In (per auditorium seat/car space)

Workers:  Construction (per person/shift)

Workers:  Office (per person/shift)

 

 

3-5

60

 

50

15

50

35

20

25

 

50

100-150

40

60

50-75

15-35

60

50

250-400

50

50

40

 

25

50

 

20

10

7-10

2

 

75-100

25

15

10

400

10

5

50

15

 

Source - Adapted from U.S. Public Health Service, 1962 Manual of Individual Water Supplies

 

To use this chart, determine if the fixtures are open to the public or are for private use. Multiply the actual number of

fixtures by the weighted value listed in the chart below. Take the total value to the following page.

Fixture

Type

Hot Value

Occupancy

Cold Value

Total Value

 

Water closet

Water closet

Urinal

Urinal

Lavatory

Bathtub

Shower

Service sink

Kitchen sink

Drinking fountain

Dish machine

Laundry machine

Laundry machine

Water closet

Water closet

Lavatory

Bathtub

Shower stall

Kitchen sink

Laundry

Dishwasher

Clothes washer

 

 

Flush valve

Flush tank

1" valve

3/4" valve

Faucet

Faucet

Mixing valve

Faucet

Faucet

Valve

Valve

8#

16#

Flush valve

Flush tank

Faucet

Faucet

Mixing valve

Faucet

Faucet

Automatic

8#

 

 

Public

Public

Public

Public

Public

Public

Public

Public

Public

Restaurant

Public

Public

Private

Private

Private

Private

Private

Private

Private

Sink private

Private

Private

 

 

-

-

-

-

1.5

3

3

2.25

3

-

1

2.25

3

-

-

0.75

1.5

1.5

1.5

2.25

1

1.5

 

 

10

5

10

5

1.5

3

3

2.25

3

0.25

-

2.25

3

6

3

0.75

1.5

1.5

1.5

2.25

-

1.5

 

 

10

5

10

5

2

4

4

3

4

0.25

1

3

4

6

3

1

2

2

2

3

1

2

 

Apartments and Mobile Home Parks

 

Units

 

4

5

6

8

10

15

20

30

40

50

100

 

 

Peak Flow

 

22

25

30

40

50

75

90

110

125

140

220

 

 

All soft

 

720

900

1,000

1,440

1,800

2,700

3,600

5,400

7,200

9,000

18,000

 

 

Hot Only

 

240

300

360

480

600

900

1,200

1,800

2,400

3,000

6,000

 

 

Hot Peak Flow

 

12

15

20

26

30

45

45

65

75

85

110

 

Contact:

George Hogg

WTC

 

Email:

Copyright © 2015 Water by George

Cell:

 

Postal Address:

PO Box 12699

Lloydminster, AB T9V 0Y4