battery Watering Systems

[eelsivad]

I am replacing my Interstate Workaholic 4D hundred pound wet cell deep cycle batteries and since I don't have a slide out tary they are tough to check the water. So I am planning to add one of the watering systems and wondered about anyone's experience. I notice Aqua Pro has a system for the big 4D batteries but don't know anything about them or any others. Comments?

[sparkydog]

I have pro fill system on 4 large 6 volt batteries. Easy to use, I check batteries about once a month, put in small amount of distilled water with a squeeze bulb. I know they're always full and ready to go. Super simple system, wouldn't be without it.