Water Service Sizer

Size building water service and meter from fixture counts per IPC / UPC & AWWA M22

Plumbing Code

International Plumbing Code 2021

Fixture Count

Water Closet (Flushometer)

10 WSFU each

Water Closet (Flush Tank)

2.5 WSFU each

Urinal (Flushometer)

5 WSFU each

Lavatory (Public)

1.5 WSFU each

Lavatory (Private)

1 WSFU each

Shower

2 WSFU each

Bathtub

2 WSFU each

Kitchen Sink

1.5 WSFU each

Service Sink

3 WSFU each

Washing Machine

2 WSFU each

Dishwasher

1.5 WSFU each

Drinking Fountain

0.5 WSFU each

Hose Bibb

2.5 WSFU each

Continuous Load (GPM) — irrigation, cooling tower makeup, etc.

Street Pressure (PSI)

Building Entry Elevation (ft)

Service Line Length (ft)

Enter fixture counts to see service sizing results

MeterMax Cont.Max Peak

⅝"20 GPM30 GPM

¾"30 GPM50 GPM

1"50 GPM75 GPM

1½"100 GPM150 GPM

2"160 GPM200 GPM

3"315 GPM450 GPM

4"500 GPM700 GPM

6"1000 GPM1500 GPM

Source: AWWA Manual M22, 4th Edition