CSLB C-36 Plumbing ContractorFixture and Appliance InstallationEasy
A plumber is installing a water heater in a new construction home. The home is located in an area prone to seismic activity. What specific accessory is required by California Plumbing Code (CPC) to be installed with the water heater to mitigate earthquake damage?
- AApproved seismic strapping.
- BA thermal expansion tank.
- CA dedicated drain pan with a drain line.
- DA water heater stand/platform.
Show answer & explanationAnswer & explanation
Correct answer: A. Approved seismic strapping.
In California, due to seismic activity, the California Plumbing Code (CPC) specifically requires water heaters to be secured with approved seismic strapping to prevent them from toppling during an earthquake.
Why the other options are wrong
- B. An expansion tank is for thermal expansion, not seismic activity.
- C. A drain pan is for leak protection, not seismic stability.
- D. A stand/platform might be for elevation, but not specifically seismic bracing.
Water Heater Seismic Strapping
The code-mandated installation of specific straps and anchors to secure a water heater to the building structure, preventing it from tipping over during an earthquake.
- Required in seismic zones, such as California.
- Typically involves two straps: one in the upper third and one in the lower third.
- Must be approved materials and properly anchored.
Memory trick: Seismic zones 'Secure' water heaters with 'Straps' for 'Safety'.