Above-ground propane tanks can slide, bounce, or topple during an earthquake, causing a fire hazard from a gas leak. You can reduce the fire danger by doing the following (Figure 11-15):
- Mount the tank on a concrete pad and bolt the four legs of the tank to the pad.
- Install flexible hose connections between the tank, the supply line, and the entrance to your house.
- Clear the area around the tank of objects that could fall and rupture the tank or its gas supply line.
- Tie a wrench near the shut-off valve, and make sure all family members know where it is and how to use it.
For large tanks, such as those used commercially or on a farm, install a seismic shut-off valve.