1、Water leak at push rod of the nipple

A、Impurities enter in the nipple

Lift push rod up   with the finger, wash away impurities or remove the nipple for washing

B、Nipple is not Installed in place

Re install

2、Water leakage at nipple housing

A、The cracks in the shell

Replace

B、   The rear rubber ring is not installed in place

Re install the nipple   drinker, if it is ring problem, replace the rubber ring

3、No water from nipple

A、Nipple outlet blocked

Unloading nipple   device, flushing water pipe and nipple seat

B、Water pipe line is not leveled 

Leveling the   pipe line

C、Water pipe line has gas blocking phenomenon

Repeated push   the rod or remove the nipple to discharge gas