Harvey softener emits a constant hissing or trickling sound even when not regenerating

Safety: Turn off water to the softener if you suspect a continuous leak to drain to avoid water waste.

• Check bypass set: Confirm the Harvey bypass valves are in the correct service position and not partially open to bypass.
• Inspect drain line: Look at the drain hose outlet. If water is constantly trickling when the unit is in service mode, the internal valve is leaking to drain.
• Flush debris: Run a manual regeneration to attempt to flush any debris from the valve seats.
• Seal replacement: If the noise and drain flow persist, the rotor seals and spacers inside the Harvey valve likely need replacement.

Internal valve seal replacement is a precision task and should be performed by a Harvey-trained technician.