In California seismic zones, flexible gas connectors for water heaters must be installed with which specific requirement?
Correct Answer
C) Minimum 12-inch and maximum 36-inch length with proper support
California Plumbing Code Section 1210.1.3 requires flexible gas connectors to be minimum 12 inches and maximum 36 inches in length with proper appliance support. This prevents stress on connections during seismic activity while maintaining safe gas delivery to the water heater.
Why This Is the Correct Answer
California Plumbing Code Section 1210.1.3 specifically requires flexible gas connectors for water heaters in seismic zones to have a minimum length of 12 inches and maximum length of 36 inches, with proper appliance support. This range provides adequate flexibility to absorb seismic movement while preventing excessive stress on gas connections. The proper support requirement ensures the water heater remains stable during earthquakes, preventing dangerous gas leaks.
Why the Other Options Are Wrong
Option A: Minimum 24-inch length only
Option A only specifies a minimum 24-inch length without establishing a maximum limit or mentioning proper support requirements. California code requires both minimum (12 inches) and maximum (36 inches) length specifications, plus proper appliance support for seismic safety.
Option B: Any length with double wall construction
Double wall construction is not the specific requirement for flexible gas connectors in seismic zones. The California code focuses on length specifications (12-36 inches) and proper support rather than wall construction. Any length without limits could create safety hazards during seismic events.
Option D: Maximum 36-inch length with earthquake shut-off valve
While the 36-inch maximum is correct, earthquake shut-off valves are separate seismic safety devices and not part of the flexible connector requirements. The code specifically requires minimum 12-inch length and proper support, which this option omits.
Memory Technique
Remember '12 to 36 with support' - like a flexible ruler that's never shorter than 12 inches or longer than 36 inches, and always needs a steady hand (support) to work properly during an earthquake.
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