Abstract:Abstract: On LXSC-15E facts, we will install an adjustment ring, regulating the size of impeller box of water outlet position, to control the impact resistance of fluid on the impeller assembly, when the impeller speed changes, we can see the performance change of water meter. The main purpose is to deepen the understanding of water meter performance, do exploratory experiments on metrological characteristics, pressure loss situation, the amplitude of regulating, pressure testing etc., We can get the experience for the design of water meter in the future.