Earthquake Gas Shut-Off Valve


An earthquake will often damage gas lines, which create gas leaks that can create an extremely hazardous situation for people and property. The smallest of actions, that we think nothing of on a day to day basis, like turning on a light, can create a spark and ignite this freely leaking gas.

It doesn’t have to be that way. Protect your home and family with an automatic gas shut-off valve. During an earthquake, the valve will automatically shut off the gas supply so that the risk of earthquake-related leaking (and subsequent fire) will be reduced.

Price includes installation. Price shown is for 1″ EQ valve (the most common size). If your home needs a 1-1/4″ valve, the price is $419.

earthquake valve installed

How it works

Automatic protection

A stainless steel ball rests on a pedestal inside the valve when it is in the ON position allowing gas to flow. During a seismic disturbance of approximately 5.2 or greater on the Richter scale, the stainless steel ball falls from the pedestal and plugs the outlet passage stopping the flow of gas. The gas can only be turned back ON by manually resetting the valve.

Protection for people and property

Up to 50% of post earthquake fires are caused by gas leaks. The Northridge 2000 valve is named after the Northridge earthquake of 1993. A 6.7 on the Richter scale, the quake caused over $25 billion dollars in damage with 114,039 buildings damaged. 700,000 claims filed with FEMA for gas appliance damage.

Locally made

The Northridge 2000 was engineered and is manufactured by Seismic Safety Products in Wenatchee, WA.


  • Certified by the State of California the City of Los Angeles and CSA
  • Actuates during an earthquake of 5.2 or greater with no false trips
  • Exclusive manual shut-off and reset method (no tools required)
  • Available in 3/4″, 1″, 1-1/4″ sizes ($419 for 1-1/4″)
  • Full instructions on valve
  • On/Off sight glass indicator
  • Only one internal moving part
  • Machined from high strength solid aluminum
  • Fully anodized for corrosion protection
  • 30-year warranty