Stop wrestling with individual vent caps and a funnel. The Flow-Rite Pro-Fill system lets you water all six of your 8-volt deep-cycle batteries in a single connection -- each cell fills to exactly the right level and shuts off automatically. No overfilling, no acid spills, no guesswork.
Deep-cycle battery banks -- whether in a golf cart, RV house bank, or floor-scrubber -- need regular watering to stay healthy. Doing it cell by cell with a turkey baster or squeeze bottle is slow, messy, and easy to get wrong. Overfill a cell and you push acid out; underfill it and you cook the plates.
The Flow-Rite Pro-Fill BG-U48V-6A eliminates that risk. Automatic shut-off valves thread directly into each cell opening in place of the factory vent caps. Color-coded tubing runs between all valves in a single series circuit. Connect one water supply line, squeeze the trigger (or attach to a Flow-Rite hand pump or de-ionized water tank), and every cell fills to the correct electrolyte level simultaneously -- then stops. The whole bank is done in under a minute.
This kit is sized and tubed specifically for six 8-volt batteries arranged with 2.5-inch center-to-center cell spacing, which is the standard spacing found on most flooded lead-acid 8V golf cart and industrial batteries.
Float-actuated valve stops flow the instant the cell reaches correct electrolyte level -- overfill is physically impossible.
One inlet port connects the entire battery bank. Fill six batteries and 18 total cells in one continuous operation.
Valves thread into standard vent cap openings. No drilling, no permanent modification to the battery case.
Kit ships with tubing already sized for 2.5-inch cell spacing -- minimal trimming required on most standard battery configurations.
The BG-U48V-6A is designed for flooded (wet cell) lead-acid batteries only -- the type that requires periodic water addition. It is not for use with AGM, gel, or lithium batteries, which are sealed and maintenance-free.
Common applications for a 6-battery 8V bank (48V nominal system):
This kit is specifically tubed for 2.5-inch cell-to-cell spacing. Cell spacing is measured center-to-center between adjacent vent cap openings on the same battery. Most standard 8V golf cart batteries (Trojan T-875, US Battery US8VGC, Duracell 8V GC, etc.) use this spacing, but measure yours before ordering. Flow-Rite offers kits in other spacings for non-standard configurations.