Water is leaking from between the motor and the pump wet end, often forming a steady drip under the pump.

Safety: Isolate power and close valves or plug lines to prevent flooding before disassembly.

• Confirm leak source: Dry the pump and observe. If water emerges from the join between the Onga wet end and motor, the shaft seal is likely leaking.
• Disassemble wet end: Remove the pump from the plumbing if necessary. Separate the wet end from the motor by undoing the housing bolts.
• Remove impeller: Hold the motor shaft at the rear (often with a spanner on the shaft flat) and unscrew the impeller from the shaft.
• Replace shaft seal: Remove the old ceramic seat from the housing and the rotating carbon face from the impeller. Install a genuine Onga shaft seal kit, taking care not to touch the sealing faces with bare fingers.
• Reassemble: Refit the impeller and housing, ensuring all O-rings are in place. Reconnect plumbing and prime the pump before starting.

Persistent leaks after seal replacement may indicate a cracked housing or scored shaft and may require additional parts.