Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 890 - ILLINOIS PLUMBING CODE
Subpart M - INSPECTIONS, TESTS, MAINTENANCE AND ADMINISTRATION
Appendix A - Plumbing Materials, Equipment, Use Restrictions and Applicable Standards
Table P - Demand at Individual Water Outlets

Demand at Individual Water Outlets

Type of Outlet

Demand (g.p.m.)

Ordinary Lavatory Faucet

2.0

Self Closing Lavatory Faucet

2.5

Sink Faucet, 3/8" or 1/2"

4.5

Sink Faucet, 3/4"

6.0

Bath Faucet, 1/2"

5.0

Shower Head, 1/2"

5.0

Laundry Faucet, 1/2"

5.0

Ballcock in Water Closet Flush Tank

3.0

1" Flush Valve (25 psi flow pressure)

35.0

1" Flush Valve (15 psi flow pressure)

27.0

3/4" Flush Valve (15 psi flow pressure)

15.0

Drinking Fountain Jet

0.75

Dishwashing Machine (domestic)

4.0

Laundry Machine (8 to 16 pounds)

4.0

Aspirator (operating room or laboratory)

2.5