Most brands of valves are set to trigger between 5.1 and 5.3 magnitude. This is the magnitude that has been determined as the lowest threshold where gas pipe starts leaking.

When it comes to valve installation we have you covered from a ¾” valve on a residence, to an 8” valve on a large industrial facility and everything in between. Standard residential installation includes most homes with gas pipe size ranging from 3/4" to 1 1/4".

False triggering is a rare occurrence; we install additional bracing where required to ensure the valve does not false trigger.

Yes, the industry standard is a 30-year warranty, and all makes of valves we offer come with a 30-year warranty for your long lasting protection.

Being certain there are no leaks is critical. The most important element to the discussion of whether to install a valve is everyone and the structure is safe from the danger of a gas leak caused by an earthquake. While Seismic Shutoff believes it is best to have a gas specialist turn the gas back on, timing and the period it may take to schedule the gas company is not certain. The fact is you can turn the gas back on since the valve is on your side of the gas meter. The gas shut off valve (SGSV) is designed with a simple reset. To resume gas flow after shocks have subsided, gas can be turned on outside at the valve. First, it is important to be aware of the odor of gas to confirm there is no leak. To aid in a gas leak discovery, we recommend a device that acts like a smoke detector, sensitive to gas in the air, available on Amazon here. (javascript:void(0))If the detector activates or you smell gas open windows and doorways to dilute the gas in the air, then use the same reset on the valve to shut gas off manually. At that point, you can call PSE or Seismic Shutoff and one of our companies can detect the exact location of the leak and arrange for the repairs to take place. The importance of having a valve in place to shut gas off during an earthquake event is tantamount in preparing to prevent a catastrophe caused by a gas leak.

Stay calm. When you have a seismic shut-off valve installed, the valve will turn the gas flow off. Call your gas company and request to resume your gas flow and assess if any of your pipes have leaks.