Electric heaters are usually incased in a waterproof covering and put in the center of the tank. Small electric heaters are in use for heating a glass or other small amount of water. These are called immersion heaters.
147. The Elevated Water Tank. In rural homes, water is sometimes stored in an elevated tank. This is usually placed in the attic. It is frequently filled by means of a force pump connected with a windmill or gasoline engine. If there is no overflow to this tank, which there should be, it must be watched when being filled to prevent it from overflowing. It may be fitted with an automatic device similar to those used on the expansion tanks of hot-water furnaces or tanks to water closets for regulating the inflow of water.
Fig. 74. Water heater and tank.
Fig. 75. Booster for hot water.
148. Faucets. Faucets are made in different patterns, but they need practically the same care (Fig. 77). The leather, or rubber, washer in a faucet must be renewed when it leaks. To renew the washer, unscrew the cap from the faucet. Remove the valve. Take off the ring of packing. Replace with a new ring, and put the faucet together again. The only tools needed for this repair work are a wrench and a screwdriver. Shut off the water from the pipe to the faucet before beginning to repair a leaking faucet.
Fig. 76. Water tank and heater.