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Water Miser Vent Cap - Reduces Battery Watering

Water Miser Vent Cap - Reduces Battery Watering
Water Miser Vent Cap - Reduces Battery Watering
Item code Model number
Cut down on battery watering by 50%!
NOTE: Check with the battery manufacturer before purchasing these or any watering caps! These caps DO NOT FIT AUTO/TRUCK batteries.

Water-Miser Safety Vent


  • The most advanced industrial battery "flip-top" vent cap available today water miser
  • Engineered and designed to encompass all areas of concern - ease of inspection and watering, battery-top moisture reduction, electrolyte retention within cells, extended watering intervals.
  • Fume-freer environment, as well as flame and/or spark retardant characteristics.
  • An injection molded "flip-top" vent-cap addressing areas of safe and efficient maintenance during the routing servicing of industrial, semi-industrial and golf cart batteries.


Typical use is one cap per 2V cell in a battery. For example, the Trojan T-105 battery is a 6V battery with three 2V cells. The cap from each cell is replaced by the Water-Miser Hydrocap.


  • There is no need to remove vent caps - just flip open for inspection and watering
  • Escaping gases, exiting through the moisture-return medium during the charging cycle, carry fewer electrolyte laden droplets, assuring that cell electrolyte gravities are better maintained.
  • Consistency of intended cell voltages and capacity characteristics are ENHANCED.
  • Tops of the batteries remain much DRIER.
  • Cell to cell and battery to equipment body-grounding is respectively reduced.
  • Extended watering intervals are achieved.
  • The bayonet quarter-turn design ASSURES PROPER FIT for most US manufactured batteries.
  • Orientation of the cover assembly through 360 degree is standard.

Safety Factors

  • Externally initiated explosions within the battery cell(s) are virtually eliminated due to the incorporation of the flame and/or spark retardant Hydrophobic Cindered Disc.
  • The built in Anti-Splash device assures that a minimum of electrolyte is propelled into the immediate area when the Flip-Top is opened for inspections or watering.
  • The handling of acid-ladened vent-caps is a thing of the past: just FLIP OPEN, FLIP SHUT - lesser exposure to electrolyte (sulfuric acid) as fumes and/or liquid.

And remember

  • Its design accommodates most single-cell fillers having nozzle diameters of up to 3/4 inch.
  • It does not fit Interstate brand batteries.
  • Flip-Top Labor savings, during servicing, versus the standard vent-cap will more than compensate for the costs within the first 6 months.
  • There is a 1" clearance above the batteries when the caps are installed.

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