Earthquake Gas Shutoff Valve Installation in San Francisco

Protect your home from gas leaks and fire risk after a quake. Licensed, permitted, and installed by a family-run SF plumber.

Licensed CSLB #782787 · Family-run since 2000 · Permits handled start to finish

Why San Francisco Homes Need a Seismic Gas Shutoff Valve

San Francisco sits between the San Andreas and Hayward faults. The question isn't if the next major quake happens — it's when. A seismic gas shutoff valve is one of the most cost-effective protections you can install before that day comes.

Gas Leaks Are the #1 Cause of Post-Quake Fires

After the 1989 Loma Prieta earthquake and the 1906 San Francisco quake, the vast majority of structural fires were caused by ruptured gas lines — not the shaking itself. A seismic valve automatically shuts off your home's gas supply when significant ground motion is detected, stopping leaks before they ignite.

Required by Many SF Insurance Carriers and Lenders

A growing number of homeowner's insurance policies in San Francisco now require or strongly recommend earthquake gas shutoff valves — especially for older homes, multi-unit buildings, and properties being sold or refinanced. Some carriers offer premium discounts when one is installed. Check your policy or ask your agent.

You Won't Be Home When It Happens

The worst-case scenario isn't being home during a quake — it's being at work or away. Manual shutoff valves require someone to be home and aware of the leak. A seismic valve activates on its own the moment shaking exceeds the threshold, protecting your home even when you can't.

What's Included in Every Garcia Plumbing Earthquake Valve Installation

Every job is permitted, inspected, and built to last. Here's exactly what you get when you hire us.

✓ A code-compliant seismic gas shutoff valve, properly sized for your home's gas line (most homes use a Little Firefighter ALV-300 or equivalent)

✓ Full installation by a licensed plumber — including line shutoff, valve mounting, line modification if needed, and pressure testing

✓ City of San Francisco permit, pulled by us before work begins

✓ City inspection coordination — we schedule it and meet the inspector on-site

✓ Final activation test to verify the valve responds correctly to a simulated seismic event

✓ Cleanup and disposal of any old fittings, brackets, or removed materials

✓ Documentation for your insurance carrier — including permit numbers, model details, and a paid invoice they can submit for credit or discount review

✓ 1-year workmanship warranty on the install

We do not subcontract this work. Every install is performed by Garcia Plumbing Co. directly.