The backflow meter will not turn
Water meter, good water meter is not to turn, and some not very good will turn
When the water flow, the general meter will turn on the water meter, but the index is not moving, generally have installed check valve check valve, but also can not guarantee the water does not return, you can get a new check after try, pour water inside it will the water down, when you want to control the water the best way is to install a valve or without the electronic water valve closed.
What water meters, some water meters performance is not particularly good, back to the water when it will be reversed, if it is some good performance of water meter and check valve water meter, water meter down stream will not affect!
