Water leaking from around the clear pump lid when the pump is running.

Safety: Turn off the pump before removing the lid.

• Clean sealing surfaces: Remove the Certikin pump lid and O-ring. Clean the groove and mating surface thoroughly.
• Inspect O-ring: Check for cracks, flat spots, or stretching. Replace with the correct Certikin lid O-ring if damaged.
• Lubricate: Apply a thin film of silicone-based lubricant to the O-ring to improve sealing and ease of fitting.
• Refit lid: Seat the lid evenly and hand-tighten. Do not overtighten as this can warp the lid.