Stop guessing and stop overfilling. The Pro-Fill BG-U48V-CJ lets you water all four 12V batteries in your 48V golf cart in a single connection -- automatic shut-off valves stop flow the instant each cell reaches the correct level.
Manual battery watering is one of the most common causes of premature battery failure in golf carts -- either from neglect or from overfilling that dilutes electrolyte and corrodes terminals. The Flow-Rite Pro-Fill BG-U48V-CJ solves both problems at once. Connect a single water source to the fill port, and the interconnected tubing distributes water to every cell simultaneously. The automatic shut-off valves -- which replace your existing vent caps -- stop water flow the instant each cell reaches the proper level. No measuring, no checking, no spills.
This kit is the non-winged, non-shrouded universal configuration, designed for standard 12V flooded lead-acid batteries in a four-battery (48V total) golf cart arrangement. It ships with 132-flex manifolds that accommodate slight variation in battery terminal and cell spacing, making it compatible with a wide range of golf cart battery brands and models without custom fitting.
Float-operated valves stop water flow when each cell reaches proper level -- eliminates overfill damage.
One connection waters all four batteries at once -- fill the entire bank in under two minutes.
Flexible manifold design accommodates minor spacing differences between battery cell openings.
Non-winged, non-shrouded design fits a broad range of standard 12V flooded lead-acid batteries.
The BG-U48V-CJ kit contains everything needed for a complete four-battery installation:
A compatible Flow-Rite hand pump or gravity-feed water source is required for use but is sold separately. Check that your water source fitting matches the Pro-Fill quick-connect standard.
Flooded lead-acid batteries lose water during charging through electrolysis. Cells that run low on water expose plates to air, causing rapid sulfation and permanent capacity loss. Overfilling pushes electrolyte out during charging, lowering specific gravity and corroding battery trays and cables. The Pro-Fill system maintains the correct level automatically, extending battery life and protecting your investment.
This kit is configured for four (4) 12V batteries wired in series to produce a 48V golf cart system -- common in many Club Car, EZGO, and Yamaha electric cart models that use 12V battery packs. Verify your battery vent cap thread type matches the Pro-Fill valve thread before ordering. Flow-Rite offers alternative kits for 6V battery systems (6x 8V or 6x 6V configurations). This is the non-winged, non-shrouded variant -- if your batteries have side-post wings or plastic shrouds over the cell openings, a different kit suffix may be required.
Always water flooded lead-acid batteries after a full charge cycle, not before. Watering before charging can cause overflow as gassing during charge expands the electrolyte. The Pro-Fill shut-off valve accounts for the charged state -- filling after a full charge gives the most accurate fill level.
Pair the BG-U48V-CJ with a Flow-Rite Pro-Fill hand pump or gravity bottle for a complete, mess-free watering station. Flow-Rite also offers battery watering systems for 36V carts (3x 12V or 6x 6V) and 48V carts running 6x 8V batteries -- confirm your battery count and voltage before selecting a kit.