The majority of consumers, when buying water nozzle, the first to see whether the water nozzle electroplating surface is shiny and symmetrical, pay attention to whether there is peeling, cracking, burning, dew bottom, peeling, black spots and obvious hemp spots and other defects.

Second, pipe thread accuracy is the nozzle and hose or pipe connection, when the choose and buy visual thread surface dent, tooth and other obvious defects, special attention is the pipe thread and coupling coupling effective length will affect the sealing, buy should pay attention to the effective length of pipe thread and thread thickness, suggest to choose the wall thick thread.