Jumping or skipping zones is the most common issue faced by indexing valves.
Sadly it’s not the indexing valve causing the issue but rather how it integrates with the rest of the irrigation system and how that system is operating.
For example, issue number one:
The Faulty Check Valve.
The check valve is used on pump driven systems and it’s sole purpose is to maintain the prime in the pump. If the check valve doesn’t close completely the water will trickle back to the source and leave air pockets in the line.
The pump will lose it’s prime and have to re-prime itself every time you shut it off for any reasonable length of time. It doesn’t usually take long.
You will most likely notice this after your pump being off for a decent amount of time and when you crank it up, it takes anywhere from a few seconds to a few minutes to get water.
