Dual Pro RS4 4 Bank Battery Charger w/3 Bank B.O.S. [RS4/BOS12V3] Entertainment | Subwoofers The check valve on the

The check valve on the outlet stops water from flowing back into the tank

Vinyl Insulated

Latch-tite™ Lifting Handle - 3" Round - Stainless Steel

NPT pipe to hose fitting

Integrated AHRS (Attitude Heading Reference Sensor)

Dual Pro RS4 4 Bank Battery Charger w/3 Bank B.O.S. [RS4/BOS12V3] Entertainment | Subwoofers The check valve on theRS4 4 Bank Battery Charger with 3 Bank B. O. S. This kit includes Dual Pros B. O. S. Battery Optimization System 12V 3 Bank (PN: BOS12V3) and Dual Pros RealPRO Series Battery Charger 24A 4 Bank (PN: RS4). B. O. S. (Battery Optimization System) 12V 3 Bank B. O. S. actively shuttles energy between batteries to keep the pack balanced, increasing battery strength and longevity. Batteries in a pack will become out of balance and the pack is only as good as