The Pro-Fill On-Board Battery Watering System simplifies maintenance of 6-volt RV battery banks. Fill multiple batteries simultaneously from a single remote position without removing vent caps or touching battery terminals.

• Fits all standard 6-volt lead-acid batteries
• Fills up to six batteries from one fill point
• Automatic control valves direct water to low cells only
• Prevents over-filling and under-filling
• Several batteries can be filled at the same time
• Enhances battery life and performance
• Safer and more accurate than manual filling
• Black durable construction
• 3-year limited warranty