WATER SUPPLY 



275 



reading the meter at the beginning and at the end of the period, 

 and then subtracting the first reading from the second. 



If water is being wasted through some leak, this can be easily 

 detected by observing the hand on the circle marked " 1 foot," 

 and computing the amount of water wasted per day or month. 



Leaks and Faucets. Water faucets are provided with replace- 

 able valve discs which occasionally must be renewed because of the 



FIG. 174. What part of this faucet requires renewing occasionally? What 

 allows water to run from the pipe when the screw is turned? 



constant wear. When a disc is worn thin, water begins to drip from 

 the faucets an action which may cause a great deal of waste. 



Experiment to Determine the Amount of Water Lost through Faucets 

 Dripping. Turn on a faucet slightly, and measure the amount of water in 

 pints, quarts or gallons which may run out of the faucet in fifteen minutes. 

 Determine the amount that would run out in twenty-four hours. Determine 

 the amount for a week, month and year. Find the cost of your water supply, 



