Harvey G3258 H25 Service Meter Assembly | Genuine Replacement for Twin Tank Water Softeners

The Harvey G3258 H25 Service Meter is the "brain" of your mechanical water softener. It is responsible for precisely measuring water consumption to trigger a regeneration cycle at the optimal moment. Once triggered, control is handed over to the regeneration meter to manage the brine draw and resin cleaning process.

⚠️ Compatibility Warning

• Models: Specifically designed for Harvey H25 series twin tank softeners.

• Note: This part is not suitable for the newer H20b or H20c models.

Key Symptoms: Why Replace the G3258?

While a softener "running to drain" is often a shuttle valve issue, a faulty Service Meter manifests in more specific ways:

1. Hard Water Intermittently: If the meter fails to measure consumption, the system won't trigger a regeneration, leading to hard water passing through the system.

2. Incorrect Regeneration Timing: The system regenerates too frequently (wasting salt) or not often enough.

3. Salt Bin Overfilling: If the regeneration cycle is not being initiated or completed correctly due to meter failure, the brine tank levels may become erratic.

4. Complete Cycle Failure: If the Service Meter fails to "hand over" control to the Regeneration Meter, the system will stall.

Step-by-Step Troubleshooting & Airlock Fix

If your softener is continually running to drain, we recommend replacing the G1491 Shuttle Valve first. If issues persist after a shuttle change, you may have an airlock. Follow these steps to flush the system:

1. Isolate: Turn off both the Inlet and Outlet valves.

2. Depressurize: Open the nearest softened water tap.

3. Sequence: Open the Outlet valve first.

4. Flush: Slowly open the Inlet valve. You will hear air being expelled through the tap. Continue until the flow is steady.

5. Test: Manually run the regeneration cycle twice to ensure the air is fully purged and the meters are engaging.

6. Next Step: If salt bin issues or drainage faults continue after these steps, replace the G3258 Service Meter Assembly.