Earthquake Shut-Off Valve Installation
California Contractor License #399170
- ●Serving homes since 1976
- ●Same-day service
- ●Licensed and insured
- ●Quality workmanship
Ready when you need us

Earthquake Shut-Off Valve Installation services
Earthquake shut-off valve installation adds a certified automatic device to eligible customer-owned gas piping downstream of the utility meter. The valve must be selected and sized for the piping and connected load, installed in an appropriate orientation and location, and integrated without obstructing utility equipment.
Earthquake shut-off valve installation
We install an approved seismic valve on eligible customer-owned gas piping downstream of the utility meter.
Existing-valve inspection
We inspect an installed valve for damage, orientation, accessibility, certification information, and piping compatibility.
Earthquake valve replacement
We replace an eligible damaged, outdated, or unsuitable valve with an approved compatible device.
Valve reset and operating review
We assess an activated valve and explain the safe restoration steps that apply after the gas system is checked.
Gas piping connection work
We complete approved customer-side piping changes needed for the valve installation or replacement.
Our same day service promise
Our fully stocked trucks help us complete eligible, approved work during the same visit. Specialty parts, permits, or added work may require a follow-up.
100% Satisfaction Guarantee
If you are not satisfied with our completed work, we will return and redo work within the approved scope at no additional charge.
Signs you may need earthquake shut-off valve installation
If gas is suspected, evacuate immediately and call SoCalGas at 1-800-427-2200 from a safe location; call 911 when the leak may endanger people or property.
You want automatic shutoff protection
The property piping, meter arrangement, total appliance load, pipe size, mounting, and certified valve options must be evaluated.
An existing valve has triggered
Do not assume the gas system is undamaged or reset service without the appropriate inspection and restoration procedure.
You smell gas after an earthquake or at any time
Evacuate immediately and call the gas utility from a safe location. Do not operate switches, flames, vehicles, or devices that could create a spark.
Automatic valve, manual shutoff, or leak response?
Earthquake valve installation
A planned protective project using an eligible certified device.
Manual shutoff
A different control that should be used only under appropriate utility emergency guidance.
Suspected gas leak
Requires evacuation and immediate utility contact, not an installation appointment.
Related services: Gas Line Installation & Repair
What determines the valve installation?
Certified valve and sizing
California DSA certifies residential earthquake-sensitive valve models; the selected device must also fit the piping and appliance load.
Location and piping
The valve is installed on customer piping downstream of the utility delivery point with suitable access, support, orientation, and clearance.
Testing and gas restoration
Approved piping is tested, and utility restoration rules apply if service at the meter has been shut off.
What happens during earthquake shut-off valve installation?
Our plumber follows these steps when planning earthquake-valve installation:
- 1. Review the meter area, customer piping, existing valve, and connected gas loads.
- 2. Confirm a suitable certified device, size, location, orientation, and access.
- 3. Explain piping changes, testing, coordination, and project pricing.
- 4. Install the authorized valve and complete applicable testing.
- 5. Review valve identification and what to do after activation or suspected leakage.
Why choose Mike Diamond for earthquake shut-off valve installation?
We evaluate the service need, explain the recommended scope, and provide pricing before authorized work begins.
Earthquake Shut-Off Valve Installation questions
What does earthquake shut-off valve installation include?
Earthquake shut-off valve installation adds a certified automatic device to eligible customer-owned gas piping downstream of the utility meter. The valve must be selected and sized for the piping and connected load, installed in an appropriate orientation and location, and integrated without obstructing utility equipment.
When should I request earthquake shut-off valve installation?
The property piping, meter arrangement, total appliance load, pipe size, mounting, and certified valve options must be evaluated.
What affects the cost of earthquake shut-off valve installation?
The price depends on certified valve type and size, connected load, piping configuration, access, supports, testing, utility coordination, and permits when applicable. We explain the recommended scope and price before authorized work begins.
How do you decide between this service and another option?
Earthquake valve installation: A planned protective project using an eligible certified device. Manual shutoff: A different control that should be used only under appropriate utility emergency guidance. Suspected gas leak: Requires evacuation and immediate utility contact, not an installation appointment.
What should I do if I suspect a gas leak?
If gas is suspected, evacuate immediately and call SoCalGas at 1-800-427-2200 from a safe location; call 911 when the leak may endanger people or property.


