Water flow meter (known as Water meter) is the legal measuring instrument. As the basis of water fee pricing, according to the technical specifications of Water meter verification and inspection, the validity period of Water meter verification is 8 years. To ensure the validity of Water meter measurement, Taiwan Water Corporation will take the initiative to do Water meter replacement free before the validity period of Water meter verification expires. Before replacement, it will send out scheduled time of the replacement notice to users. It will be signed by the user or a notice left after the replacement. If the user has any questions about the replacement of the Water meter, he can call Taiwan Water Corporation’s free 1910 customer service line for inquiry.