Water leakage from your Sub-Zero ice maker can lead to significant problems, including water damage. Here are potential causes of water leakage and DIY solutions:

1. Damaged Water Supply Line
   Inspect the water supply line for visible damage, such as cracks or leaks. If you find any damage, replace the water supply line with a new one, following manufacturer guidelines.

2. Blocked or Frozen Drain Line
   Check the drain line for obstructions or ice buildup. A blocked drain can cause water to overflow. Carefully clear any blockages using a pipe cleaner or warm water to melt ice. Ensure that the drain line is properly connected and sloped to allow water to flow freely into the drain pan.

3. Faulty Water Inlet Valve
   Inspect the water inlet valve for signs of leaks or malfunction. If the valve is damaged or leaking, it may need to be replaced. Consult your Sub-Zero user manual or a professional technician for guidance.

4. Excess Ice Buildup Inside the Ice Maker
   If there is excessive ice buildup within the ice maker itself, it can lead to water leakage when the ice melts. Defrost the ice maker by turning it off and allowing the ice to melt completely. Ensure proper drainage during this process.

5. Improper Installation
   Review the installation of your ice maker, particularly the water supply and drainage connections. Make sure all connections are secure, and there are no kinks or bends in the lines.

6. Damaged Ice Maker Components
   Inspect the ice maker assembly for any damaged components, including cracked trays or malfunctioning sensors. Replace or repair damaged components as necessary, following manufacturer recommendations.

If the issue persists after attempting these DIY solutions, it is advisable to consult a professional Sub-Zero technician for a thorough inspection and any necessary repairs. Water leakage should be addressed promptly to prevent further damage to your appliance and surrounding areas.