Simply put:1, the heavier the better.2, the cover and the joint must be copper.3, go to the local water company to buy the best.
If you don't understand it, say "1", the more the better. 2 table covers and watch fittings must be copper. 3, go to the local water company to buy the best.
The accuracy of the former is higher than that of the latter, but it requires high water quality and is easily blocked when the water contains impurities. An instrument for recording the amount of water used in running water is mounted on a water pipe, and when the user leaves the water, the pointer or wheel turns on the table to indicate the amount of water passed.
An instrument for measuring water flow. The cumulative flow of water is mostly measured. Generally divided into the volume of water meters and speed water meter two categories.
