Fixtures & Water HeatersQuestion 78 of 120
A showerhead is rated at the maximum allowable flow. A user showers for 8 minutes. Assuming the head flows at its rated maximum, how much water is used?
a.12.0 gallons
b.17.6 gallons
c.24.0 gallons
d.20.0 gallons
Explanation
The maximum showerhead flow rate is 2.5 gpm at 80 psi, and 2.5 times 8 minutes equals 20 gallons. 17.6 gallons would result from a 2.2 gpm lavatory faucet rate, which does not apply to showerheads. 12 gallons uses a 1.5 gpm rate and 24 gallons uses 3.0 gpm, neither of which is the code maximum for a shower.
Law Reference: IPC §604.4Practice all 120 questions free — no signup required.
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