Water Supply & DistributionQuestion 1 of 360
A single-family dwelling has a total demand of 22 water supply fixture units (WSFU). Using the code sizing tables, which is the smallest nominal water service pipe size that is generally acceptable for a building water service?
a.3/4 inch
b.1/2 inch
c.3/8 inch
d.1/4 inch
Explanation
The code establishes 3/4 inch as the minimum nominal size for a building water service serving a typical dwelling, and 22 WSFU falls within its capacity for normal developed lengths and pressure. A 1/2 inch, 3/8 inch, or 1/4 inch service is below the allowed minimum for a building supply and would not be code-compliant.
Law Reference: 2022 California Plumbing Code (CPC) §610.0Practice all 360 questions free — no signup required.
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