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Tuesday, April 16th 2019, 3:52pm

K-rain 4004 changing zones on its own

I have a customer that has a 4004 valve connect to a centrifugal style well pump. When the system is set to zone 1 it will run for 2-3 minutes then change to zone 2. It does this all while the pump is running. I assumed a loss of pressure was happening. I capped off 4" popup heads and ran the system. It stayed on zone 1, and I also found a leak. Repairs were made and the capped heads re installed. Ran the system and it ran as it should. A few days later customer states that the auto switching to other zones is back.

The pump does surge a little, so I'm thinking I have another leak, or the well is running dry. ( we are in FL)

An suggestions on steps to take next would be great.


Supreme Member

Posts: 5,340

Location: Metro NYC


Wednesday, April 17th 2019, 4:47am

Concentrate on the pump. If it fails to output steadily, the valve will index to the nest zone. Check for a suction leak. Can you throttle down the flow from the pump?

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