Stop wrestling with individual vent caps and risking acid spills. The Flow-Rite Pro-Fill BG-U24V-BG replaces your existing vent caps with automatic shut-off valves interconnected by flexible tubing, so you water an entire 24V battery bank from a single fill point -- in seconds, not minutes.
The Pro-Fill Universal 24V system is purpose-built for battery banks composed of 8-volt deep-cycle batteries -- the configuration common in golf carts, floor scrubbers, and many RV house-battery setups. Each cell receives precisely the right amount of water every time, because the automatic shut-off valves stop flow the instant the electrolyte reaches the correct level. No more guesswork, no more overfilling, no more acid overflow onto terminals or battery trays.
The kit includes 129 flex manifolds, giving you the interconnect tubing needed to route from battery to battery across a full 24V bank. One dedicated fill point -- typically connected to a hand pump, gravity jug, or flow-rite powered pump -- services every cell in the bank simultaneously.
Float-controlled valves stop flow at the correct electrolyte level -- every cell, every time.
Pre-cut flexible tubing manifolds interconnect all cells across the full 24V bank.
One connection waters the entire bank -- works with hand pump, gravity jug, or powered pump.
Designed to fit standard 8V deep-cycle batteries with conventional vent cap openings.
Each automatic shut-off valve threads directly into the existing vent cap opening on your battery. Inside the valve, a float rises with the electrolyte level. When the correct level is reached, the float seats against the inlet and stops water flow -- regardless of how much pressure remains in the supply line. This means all cells equalize to the proper level simultaneously, even if some start drier than others.
The flexible manifold tubing connects valve to valve in a series-parallel loop. Water enters at the designated single fill point, distributes through the tubing network, and each valve meters its own cell independently. The result is a consistent, calibrated fill across every battery in the bank without any manual measurement.
This system is designed for any installation running a 24V deep-cycle battery bank built from 8-volt batteries -- typically three 8V batteries wired in series. Common use cases include:
The BG-U24V-BG works with any clean water supply that can be connected to the Pro-Fill single fill point. Flow-Rite hand pumps, gravity jugs with tubing, and Flow-Rite electric pump systems are all compatible. A filtered or deionized water source is recommended to minimize mineral buildup inside the cells. The supply line connects to a single quick-connect or hose fitting at the fill point -- no permanent plumbing required.
This system is designed specifically for flooded (wet cell) lead-acid batteries. It is not compatible with AGM, gel, or sealed maintenance-free batteries, which do not have accessible vent openings and do not require water addition. Confirm your batteries are flooded lead-acid before ordering.
For the fastest fill experience, pair this kit with a Flow-Rite hand pump or 12V electric pump (sold separately). A powered pump pushes water through the manifold in one continuous flow, filling all cells in under 30 seconds. The auto shut-off valves handle the rest -- no monitoring required.