The World’s First Flip-Top Watering Cap
Water Wise Flip-Top Watering Caps limit the nozzle depth of automatic watering guns to achieve accurate electrolyte levels without the use of adjustable O-rings.
Take the guess-work out of refilling battery cells! Simply leave the Flip-Top Watering Cap in place. Your batteries will always have the proper electrolyte levels ensuring longer life. You get peace of mind knowing that every battery cell is watered properly and safely.