34.07° N · 118.10° W · WESTERN SGV
Earthquake straps for your water heater
California requires water heaters to be braced for earthquakes.
Updated · 3 min read
Straight answer
Strap the tank to the wall studs in two places, one in the upper third and one in the lower third, with the lower strap at least four inches above the controls. Use a flexible gas connector and fill any gap between tank and wall so it cannot swing.
What this covers
Why it matters here
The San Gabriel Valley sits among active faults. A tank full of water weighs hundreds of pounds, and if it tips, it can break its gas line and water connections.
State law (Health and Safety Code 19211) requires water heaters to be braced, and the Division of the State Architect publishes bracing guidance for this reason.
Where the straps go
SoCalGas's emergency preparedness page says to strap the tank to the wall studs in the upper and lower one-third of the tank, with the lower strap at least four inches above the thermostat controls.
Older garages and closets
Many SGV houses date from the 1950s and 1960s. Census figures put median build years at 1957 in San Gabriel and 1959 in Rosemead.
Water heaters in those houses often sit in tight garage corners or interior closets, sometimes between studs that are hard to reach. Bracing kits come with spacers and blocking for those spots.
What a retrofit includes
- Two heavy straps lagged to studs or blocking
- A spacer so the tank cannot swing back toward the wall
- A flexible gas connector if rigid pipe is in place
- Flexible water connectors on top of the tank
FAQs
Is plumber's tape strong enough?
Thin perforated tape can tear in shaking. Use a rated strap kit.
Do tankless heaters need straps?
They mount directly to the wall, so standard tank straps do not apply. The gas and water connections still need to be secure.
Should a drain pan be added too?
A pan with a drain line protects floors from leaks. It is often added during a retrofit.