Stop pulling vent caps and guessing water levels. The Flow-Rite Pro-Fill system replaces your existing vent caps with precision automatic shut-off valves, links your batteries with flexible tubing, and lets you fill an entire 4-battery bank in seconds -- with a hand pump, no pressurized water line required.
Most battery watering kits are sized for standard group battery spacing found in golf carts and many RV battery compartments. The BG-U12V-4G-WS is specifically configured for installations where battery-to-battery spacing falls outside standard layouts -- think custom RV battery boxes, irregular bank configurations, or side-by-side arrangements that don't line up with off-the-shelf tubing runs.
Each automatic shut-off valve is designed to fill its cell to the correct electrolyte level and then stop -- no overfilling, no spills, no guesswork. Once installed, routine watering goes from a multi-step, acid-splashing chore to a 30-second one-connection task.
Float-controlled valves stop flow precisely at the correct fill level every time -- no overfilling, no dry cells.
Tubing lengths sized for batteries that don't conform to standard group-spacing layouts common in golf carts.
No pressurized water connection needed. The included hand pump lets you fill anywhere -- garage, storage lot, or off-grid campsite.
Shut-off valves thread directly into existing vent cap openings on standard flooded lead-acid batteries.
This kit is engineered as a complete solution for a 4-battery bank. Contents include:
Flooded lead-acid batteries -- including AGM-replacement candidates, golf cart 6V pairs, and deep-cycle house batteries -- need regular watering to maintain electrolyte levels. Under-watering causes sulfation and permanent capacity loss. Over-watering causes acid overflow that corrodes terminals and battery boxes. Flow-Rite's precision shut-off valves eliminate both failure modes with zero guesswork.
This system is designed for flooded lead-acid (wet cell) batteries only -- the type that requires periodic water addition. It is not for use with sealed AGM, gel cell, or lithium batteries, which have no vent caps and no electrolyte access points.
"Non-standard spacing" refers to the center-to-center distance between batteries in the bank. Standard golf cart configurations follow a predictable layout. RV house battery compartments, custom skid-mounted banks, and aftermarket battery boxes often place batteries closer together, farther apart, or in L-shaped or staggered arrangements. The BG-U12V-4G-WS uses extended or custom-length tubing runs to bridge those gaps without kinking or pulling on the valve fittings.
Installation requires no special tools beyond a vent cap removal tool (or gloved hand) and basic plumbing assembly. General steps:
Ensure batteries are already at a safe state of charge before adding water -- charging after a full top-off is standard practice and causes electrolyte to expand slightly. Adding water to a fully discharged battery before charging can result in overflow during the subsequent charge cycle. Always wear eye protection and acid-resistant gloves when working around flooded batteries.