The genuine Flow-Rite BA-QDV-505 is the male quick-disconnect coupler used in Pro-Fill, Millennium Evo, and Stealth single-point battery watering systems. When a coupler wears out, leaks, or breaks, this OEM-spec replacement restores a clean, drip-free connection to your watering manifold without replacing the entire kit.
Single-point battery watering systems depend on quick-connect couplers to link the fill manifold to the water supply hose. The BA-QDV-505 is the male half of that quick-disconnect pair -- the side that plugs into the female coupler on the manifold or supply line. It terminates in a 1/4 inch barb, sized to accept standard 1/4 inch ID tubing used throughout Flow-Rite Pro-Fill and compatible system assemblies.
Over time, coupler bodies can crack from UV exposure, freeze-thaw cycles, or accidental impact. Replacing just the coupler -- rather than an entire manifold assembly -- keeps your battery maintenance routine running without unnecessary downtime or cost.
Direct replacement for the male coupler in Pro-Fill, Millennium Evo, and Stealth watering kits. No modification needed.
Accepts standard 1/4 inch ID supply tubing. Barb design holds tubing securely without clamps under normal operating pressure.
Push-to-connect, pull-to-release coupling. Allows the fill hose to detach cleanly between watering cycles with minimal drip.
Constructed to handle dilute sulfuric acid splash and electrolyte contact typical of lead-acid battery maintenance environments.
Flow-Rite Pro-Fill, Millennium Evo, and Stealth systems replace the caps on every cell of a lead-acid battery bank with a manifold of float valves. A single fill hose connects to the manifold via a quick coupler. You attach a water source, press it in, and all cells fill automatically to the correct level -- no removing individual caps, no overfilling, no acid splashes. The BA-QDV-505 is the quick-connect fitting at the end of that supply hose.
This coupler is confirmed for use with the following Flow-Rite battery watering system families:
If you are unsure which system you have, check the coupler style on your existing fill hose. The BA-QDV-505 mates with the female quick coupler used across these three Flow-Rite product lines.
The BA-QDV-505 is the male coupler only. It does NOT include the female receiver side. If your female coupler (on the manifold inlet) is damaged, that is a separate part. Verify which half of the coupling pair needs replacement before ordering.
If you are building or restoring a complete watering system, also consider: