Stop pulling individual vent caps and guessing water levels. The Flow-Rite Pro-Fill system connects all 8 of your 6V deep-cycle batteries into a single-point fill network -- one hose connection waters every cell to the correct level automatically, then shuts off.
Whether you run a 48V golf cart-style bank, a large RV house bank, or a floor-scrubber setup, the BG-U48V-1A is engineered for a bank of exactly eight (8) standard 6V flooded lead-acid batteries with 2.7-inch center-to-center cell spacing. Each battery has 3 cells, giving you 24 total fill points that would otherwise require individual attention.
The kit replaces your existing vent caps with precision automatic shut-off valves, then links every valve with pre-cut tubing. Connect a single water source to the fill port and pressure fills every cell simultaneously. When each cell reaches the correct electrolyte level, its valve snaps closed -- no overflow, no dry cells, no acid spills.
Valves close automatically at the correct electrolyte level -- eliminates over-filling and acid overflow on your battery tops.
One external hose connection services all 8 batteries. No more removing individual caps or balancing a watering gun across a crowded battery compartment.
Fits standard Group GC2 and similarly sized 6V flooded batteries with 2.7in cell spacing -- common in RVs, golf carts, and floor equipment.
Includes valves, interconnecting tubing, fill coupler, and hardware needed to plumb all 8 batteries in a matched bank.
The BG-U48V-1A ships as a complete assembly kit sized for an 8-battery 6V bank:
Note: A water supply hose or hand pump (sold separately) is required for use. This kit does not include a pump or bulk water reservoir.
Each Pro-Fill valve uses a float mechanism calibrated to the correct fill height for standard flooded lead-acid cells. Water pressure seats the valve open; when the electrolyte contacts the float, the valve closes. The system works with low-pressure hand pumps or a gravity-fed jug -- no high-pressure supply needed.
This kit is configured for 8 standard 6V flooded lead-acid batteries with 2.7 inches of center-to-center cell spacing. Common compatible batteries include:
If your batteries have different cell spacing (2.5in or 3.0in are common alternatives), select the matching Pro-Fill kit for your spacing. Measure center-to-center between adjacent vent cap holes before ordering.
Eight 6V batteries wired in series/parallel produce a 24V or 48V bank depending on wiring. This kit is sized specifically for 48V banks using 8 batteries in series (common in golf carts and large RV house banks), but the watering plumbing works regardless of electrical wiring configuration as long as you have exactly 8 standard 6V batteries with 2.7in cell spacing.
Installation typically takes 30-60 minutes for someone comfortable working around batteries. Basic steps:
Pair this kit with a Flow-Rite Pro-Fill hand pump or gravity-fed water jug with a compatible quick-connect fitting. The single-point coupler on this kit accepts standard Flow-Rite fill system connectors. Using distilled water exclusively will extend both battery and valve life significantly.