. Principles and practice of plumbing . //7/tf/ Fig. 72Velocity Meter Digitized by Microsoft® 150 Principles and Practice of Plumbing. Fig. 73Volume Meier the action of hot water, and may also be used for that pur-pose. Loss OF Head in Meters.—There is considerable lossof head in small meters, but this loss grows less and less asthe size of the meter increases, until above 6 inches in diameter it is almost anegligible quantity. Insmall house meters,however, it is a matterof considerable moment,as the loss of head re-quires twice the lengthof time to discharge agiven quantity of waterthrough a
. Principles and practice of plumbing . //7/tf/ Fig. 72Velocity Meter Digitized by Microsoft® 150 Principles and Practice of Plumbing. Fig. 73Volume Meier the action of hot water, and may also be used for that pur-pose. Loss OF Head in Meters.—There is considerable lossof head in small meters, but this loss grows less and less asthe size of the meter increases, until above 6 inches in diameter it is almost anegligible quantity. Insmall house meters,however, it is a matterof considerable moment,as the loss of head re-quires twice the lengthof time to discharge agiven quantity of waterthrough a meter thatwould be required todischarge it merelythrough a pipe of thesame length. In Table XL will be found the relative lengths of timerequired for the ilow of various quantities of water throughmeters of different sizes, and through the connections tests were made on disk meters by the Bureau ofWater, Chicago. The tests were all madeunder a pressure of 30 poundsto the square inch. Water Meter Rates.—The only sane and logical wayto sell water is by meter rates,just as other commodities aresold. By this method wa
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