(See Fig. A, below, to find the wind zone you live in.) It won't cost a fortune, either. A little elbow grease and the building materials will all but guarantee your family's injury-free survival in any storm that comes down the pike. Keep in mind that a safe room can be more than just a storm shelter.
Expansion Tanks. The expansion tank is a vital part of your car's cooling system and acts as an overflow reservoir catching the water/coolant mix that is forced from your radiator as it heats and builds pressure in the system. cooling systems would explode under pressure or the coolant would be forced from the overflow tube on the radiator and leak onto the road. If your find yourself having to replace coolant too regularly then check your expansion tank and the rest of your system for leaks.
A thermal expansion tank is a small, pre-pressurized tank with a compressible air cushion (diaphragm) that is installed on the supply side (cold water inlet) of a water heater. If the heating and thermal expansion of water creates excess pressure within the water heater, excess water is forced into the expansion tank, keeping pressure levels within the normal operating range of the water heater. Thermal Expansion and Your Water Heater Thermal expansion is the term used to describe the expansion of water volume due to heating. All water heaters, regardless of heat-source (gas, oil, electric, solar or indirect), can experience thermal expansion. In every tank-type water heater, cold water is heated as it enters the water heater tank.