Water Heater Earthquake Strapping in California
California requires tank water heaters to be braced against earthquakes. Done right, two sturdy straps keep a full tank from toppling, breaking its gas line, and starting a fire.
- Author
- By Cabrillo Plumbing, Heating & Air
- Last updated
- Updated June 2026
- Reading time
- 4 min read
California law requires tank-type water heaters to be strapped (braced) so they don't tip over in an earthquake. A toppled tank can shear its gas line or hot-water connection and become a fire and flood hazard. Proper bracing uses two straps — one in the upper third and one in the lower third of the tank — anchored into framing, with the tank held snug against the wall. It's an inexpensive fix that's also commonly checked at point of sale.
What to know
- State code calls for two straps — upper and lower third — anchored to wall framing, not just drywall.
- An unstrapped tank can fall and break its gas or water connection, causing fire or flooding after a quake.
- Strapping is frequently verified during home sales and some permit inspections.
- Switching to a heat-pump or tankless unit changes the bracing and placement details — worth planning together.
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