$18,000 - $20,000. More than $20,000. The total amount spent per pupil by district in the 2011-12 school year by elementary and K-12 districts. The darker the color, the higher the spending.
b) Set a voltmeter to the 300 volts scale. Place test probes on terminals 1L and 3L (see diagram) of the high limit portion of the thermostat. The meter reading should be the input voltage of the heater (see rating plate of the water heater). If not correct voltage, check for loose connections and blown fuse or tripped circuit breaker. c) To verify that the high limit switch is closed, place test probes onto terminals 2L and 4L (see diagram).
How to Make Your Water Heater Last. Water heaters have a few main components âthe thermostat and the water tank. All water heaters will also have an inlet pipe for cold water, and outlet pipe for hot water. Besides, a gas water heater will have a pilot light and a temperature and pressure valve. An electrical water heater will have a heating element while a gas water heater will have a burner. To ensure that your water heater lasts longer you need to protect all of these parts. If the tank of the water heater is corroded, it needs to be replaced to prevent leaks and water floods. To extend the life of the tank you should drain the tank once a year and flush it out to remove all the sediments. This should be done after switching off the electric supply or the gas.