K-Rain Hydrotek 4000: All Zones Leak, Heads Don't Pop Up

Well pump system with K-Rain Hydrotek 4000 valve: all 4 zones leak from heads, no proper spray. Valve cleaned—no debris found.

Likely Causes

1. Discharge valve not fully open: Check valve before K4000
2. Rusted galvanized pipes: Internal restriction → replace with PVC
3. Well level dropped: Insufficient supply → need well contractor
4. Pump voltage/performance: Verify proper voltage, check for mainline leaks

Diagnostic Order

Start with discharge valve (simplest). Then check pump pressure/voltage. Galvanized pipe replacement is major but may be needed if rusted internally.