On-board battery watering system for 6-volt RV batteries.     

RV-2000
Two Battery watering system
(requires RV-2020 hand pump)

- Fill batteries in seconds from a single fill point without having to touch or even see your batteries!
- Fits all 6V lead acid batteries with standard 3-cell spacing
- Eliminates need to remove vent covers to fill
- Automatically sends water to low cells only
- Installs in minutes, no tools required
- Safer and more accurate than conventional filling
- Improves battery life and performance

RV-2020
Handy-Pump for use with Pro-Fill 6-volt battery RV edition.