At present, the water meter shows 22 1, which means that 22 1 m3 of water is used. If the water meter showed 2 10 cubic meter last month, to use the water fee is to subtract the number of the original water meter from the number of 22 1, which is the water used, 16544. Multiply 1 1 m3 by the unit price of one ton of water 4 yuan, which is the water fee to be paid this month. That is: 1 1X4 yuan =44 yuan.

Calculation method: To calculate the water fee to be paid on July 30th, we must first know how many cubic meters of water 1 is displayed on July 30th, and then look at how many cubic meters it is displayed on July 30th. The difference between the two figures multiplied by the unit water fee is the water fee to be paid this month.

Precautions:

1. When selecting the caliber of water meter, we should not only consider the pipe diameter at the installation site, but also consider the frequently used flow rate to select the appropriate caliber water meter. It is recommended to use the common flow close to or less than the flow required by the water meter.

2. The installation position of the water meter should be convenient for disassembly and meter reading, and should prevent exposure, freezing and pollution. At the same time, a valve should be installed in front of the water meter so as to disassemble the water meter without water.

3. When installing, remove impurities such as hemp and ore. From the pipeline, to prevent the filter from blocking, otherwise it will increase the word value error and affect the water supply.

4. The water meter should be installed horizontally (except vertical water meter), with the dial facing upwards, and the direction of the arrow on the case should be consistent with the direction of water flow.