Converting a Well/Indexing Valve System to Municipal Water

A Hydrotek timer controls a well pump feeding a K-Rain indexing valve. Excessive rust from the well stains everything. The owner wants to switch to county water and needs to know how to connect the timer to the new supply.

Required Components for Municipal Connection

1. Tap into main water line - After the meter, before house distribution
2. Vacuum breaker (backflow preventer) - Required by most municipalities to prevent contamination
3. 24VAC solenoid valve (master valve) - Installed after the vacuum breaker
4. Wire from solenoid to controller - Connects to master valve (MV) or pump start terminal
5. Pipe from solenoid to indexing valve - Supplies water to existing distribution

How the Controller Integrates

The existing Hydrotek timer likely has a master valve/pump start terminal. Wire the new solenoid valve to this terminal. When any zone runs, the controller energizes the master valve, supplying water to the indexing valve which then rotates through zones.

Critical Considerations

• Check local codes for required backflow device type (PVB, RP, DCVA)
• Ensure municipal pressure meets indexing valve requirements
• Verify controller's master valve terminal provides 24VAC
• Consider adding a pressure regulator if municipal pressure exceeds 80 PSI

This conversion eliminates the well pump, pump start relay, and rust issues while keeping the existing indexing valve and zone layout.