You Need to Know the size of the gas pipe to order your gas shut off valve.
I have provided a template to take the guess work out of knowing the pipe size of the gas line coming from your gas meter.
Cut the template, measure and wrap around your pipe.
The Amercian Society of Mechanical Engineers has determined that in an earthquake size of 5.4 and greater, appliances will move to break pipes, water heaters will fall over and pipes in the ground can break.
So the theory of the Earthquake Gas Shutoff valve is to brace the valve to the building so that the valve is reading what the house is doing.
I sell the valve in a kit, with a stabilizer brace and installation instructions
MOBILE HOME INSTALLATION
STABILIZER BRACKET INSTALLATION