Water Supply & DistributionQuestion 29 of 360
On which fixtures does the code most specifically require water hammer arrestors?
a.Where quick-closing valves (for example, clothes washers, dishwashers, solenoid valves) are installed
b.On every lavatory
c.Only on hose bibbs
d.Only on the water heater cold inlet
Explanation
The code requires water hammer arrestors where quick-closing valves are installed, such as clothes washers, dishwashers, and solenoid valves, because these create sudden surges. Ordinary lavatories, hose bibbs alone, and the heater inlet are not the specific quick-closing valve locations that trigger the requirement.
Law Reference: 2022 California Plumbing Code (CPC) §609.10Practice all 360 questions free — no signup required.
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