Stop topping off six cells one at a time. The BA-122-RED drops into your 8V Commander-style battery bank and lets you water every cell in seconds through a single fill point -- no overfilling, no spills, no guesswork.
The Flow-Rite Pro-Fill system replaces the individual vent caps on each battery cell with a manifold assembly that connects all cells together. When you connect the fill gun (sold separately), each cell receives exactly the right amount of distilled water and automatically shuts off at the proper level. The BA-122-RED is the manifold segment engineered specifically for 8V batteries outside the Trojan product line -- most commonly Commander-brand and similarly dimensioned 8V deep-cycle batteries -- where cell centers are spaced at 2.5 inches.
The swivel tee fitting is the key detail here. Unlike a fixed tee, the swivel allows the inter-cell tubing to articulate slightly during installation and across the battery's service life, reducing stress on the fittings and making it far easier to route the manifold in tight battery compartments common in RVs, golf carts, and floor scrubbers.
Articulating tee fitting eases routing in tight battery bays and reduces stress on connection points
Float-actuated valves stop flow at the correct electrolyte level -- no overfilling or cell damage
Engineered for Commander and similar 8V batteries with 2.5" center-to-center cell spacing
Color-matched components help identify manifold segments and connection orientation at a glance
Each BA-122-RED manifold assembly includes the vent cap valves, inter-cell tubing, and the swivel tee port that connects to adjacent batteries in the bank. Once installed, you attach a single Pro-Fill fill gun hose to the system's inlet point. Squeezing the trigger allows water to flow through all connected cells simultaneously. When each cell's float valve reaches the correct level, it shuts off automatically. Release the trigger -- you're done. A full 6-battery bank that once took 15 minutes now takes under a minute.
Cell spacing is the critical measurement when selecting a Pro-Fill manifold. The BA-122-RED is designed for batteries where the center-to-center distance between adjacent cell vent openings is 2.5 inches. This dimension is typical of Commander 8V deep-cycle batteries and certain other non-Trojan 8V flooded lead-acid batteries used in RV house banks, golf carts, and industrial floor care equipment.
Pro-Fill manifolds are NOT universal. Using a manifold with incorrect cell spacing will prevent proper valve seating and can damage the battery or manifold. Confirm:
The BA-122-RED is commonly used in the following applications where 8V non-Trojan batteries are specified:
The BA-122-RED is the manifold segment only. To complete a working Pro-Fill system you will also need a Flow-Rite fill gun (such as the Pro-Fill FG-1.5 or compatible model), interconnecting hose, and the appropriate inter-battery tubing kit for your bank configuration. Flow-Rite also offers complete kit bundles sized for common 4-battery and 6-battery bank configurations -- search by your battery count and voltage for the matching kit SKU.