Battery Vent Caps

We manufacture battery caps in both standard and custom sizes. Click on the PDF links below to view our current drawings (your browser must be set to allow pop-ups).

If you do not know which vent cap you need, please read our battery vent cap FAQ page before contacting us.

To receive a quote for any custom size,  click here to email us.

Click here to view the Water Miser battery vent cap brochure.
Click here to view the Econ-O-Flip battery vent cap brochure.

Battery Vent Caps

Part #Imagepdf icon 
4000425, 4000550, 4000600Battery Water Level Indicator

Battery Water Level Indicator


  • Instantly Know if your Battery Needs Water
  • Dual Spark Arrestors
  • Easy 1/4 Turn Installation
  • 3 Models Available for DIfferent Fill Heights
  • Acid-Proof Rubber Seal (Included)
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2000Water Miser Battery Vent Cap

Water-Miser Flip-Top Battery Vent Cap


Purchase this product here
  • Reduces Watering Intervals by up to 30%
  • Reduces Evaporation & Emissions
  • Reduces Maintenance Costs
  • Internal Spark-Flame Arrestor
  • Acid-Proof Rubber Seal Washer (Included)
  • Flip-Open Top Allows Faster Inspection & Watering
  • Flip-Top Rotates 360° for Easy Positioning
  • No Need to Remove Vent Cap from Battery
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • 1/4-Turn Bayonet Style Mount

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1050#1050 Battery Vent Cap

Standard Battery Vent Cap


Purchase this product here
  • 1/4-Turn Bayonet Style Mount
  • Acid-Proof Rubber Seal Washer (Included)
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1070#1070 Battery Vent Cap

Safety Battery Vent Cap


Purchase this product here
  • 1/4-Turn Bayonet Style Mount
  • Acid-Proof Rubber Seal Washer (Included)
  • Contains Internal Flame-Spark Arrestor to Prevent Battery Explosions
  • Safety Tested by Independent Lab
  • (Click the PDF Icon to View Certificate)
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4D-8D-PIA4D-8D Battery Vent Cap Adapter

4D-8D Battery Vent Cap Adapter


Purchase this product here
  • Converts 3/4" Diameter Hole to Accept 1/4-turn Bayonet Caps
  • Push-in Style (No seal required)
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4D-8D-SIA4D-8D Battery Vent Cap Adapter

4D-8D Battery Vent Cap Adapter


Purchase this product here
  • Converts 3/4" Diameter Threaded Hole to Accept 1/4-turn Bayonet Caps
  • Screw-in Style with Rubber Seal (Included)
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1050VCA#1050VCA Battery Vent Cap Adapter

Battery Vent Cap Adapter


Purchase this product here
  • Converts 1-3/8" Diameter Hole to Accept 1/4-turn Bayonet Caps
  • Push-in Style with Rubber O-ring Seal (Included)

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SE2218M22x1.5 Battery Vent Cap Adapter

M22x1.5 Battery Vent Cap Adapter


Purchase this product here
  • Converts M22x1.5 Threaded Hole to Accept 1/4-turn Bayonet Caps
  • Screw-in Style with Rubber O-ring Seal (Included)

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M27X3-SIAM27x3-SIA Battery Vent Cap Adapter

M27x3-SIA Battery Vent Cap Adapter


Purchase this product here
  • Converts M27x3 Threaded Hole to Accept 1/4-turn Bayonet Caps
  • Screw-in Style with Rubber Seal (Included)

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2000S#2000S Water Miser Battery Vent Cap

Water-Miser Stationary-Top Battery Vent Cap


Purchase this product here
  • Reduces Watering Intervals by up to 30%
  • Reduces Evaporation & Emissions
  • Reduces Maintenance Costs
  • Internal Spark-Flame Arrestor
  • Acid-Proof Rubber Seal Washer (Included)
  • 1/4-Turn Bayonet Style Mount

pdf iconBuy Now
2025CELL-GARD 2025 Battery Vent Cap

Cell-Gard Flip-Top Battery Vent Cap


Purchase this product here
  • Flip-Open Top Allows Faster Inspection & Watering
  • Flip-Top Rotates 360° for Easy Positioning
  • No Need to Remove Vent Cap from Battery
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • Acid-Proof Rubber Seal Washer (Included)
  • Internal Spark-Flame Arrestor
  • 1/4-Turn Bayonet Style Mount

Buy Now
2050ECON-O-FLIP 2050 Battery Vent Cap

Standard Flip-Top Battery Vent Cap


Purchase this product here
  • Flip-Open Top Allows Faster Inspection & Watering
  • Flip-Top Rotates 360° for Easy Positioning
  • No Need to Remove Vent Cap from Battery
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • Acid-Proof Rubber Seal Washer (Included)
  • 1/4-Turn Bayonet Style Mount
pdf iconBuy Now
2050SECON-O-FLIP 2050S Battery Vent Cap

Standard Stationary Top Battery Vent Cap


Purchase this product here
  • Acid-Proof Rubber Seal Washer (Included)
  • 1/4-Turn Bayonet Style Mount
pdf iconBuy Now
2075ECON-O-FLIP 2075 Push-in Battery Vent Cap

Standard Flip-Top Push-in Battery Vent Cap


Purchase this product here
  • Flip-Open Top Allows Faster Inspection & Watering
  • Flip-Top Rotates 360° for Easy Positioning
  • No Need to Remove Vent Cap from Battery
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • Water Level Indicator (Basket) for More Accurate Filling
  • Push-in Style with Rubber O-ring Seal (Included)
pdf iconBuy Now
2085Water Miser Push-in Battery Vent Cap

Water-Miser Flip-Top Push-in Battery Vent Cap


Purchase this product here
  • Reduces Watering Intervals by up to 30%
  • Reduces Evaporation & Emissions
  • Reduces Battery Maintenance Cost
  • Internal Spark-Flame Arrestor
  • Flip-Open Top Allows Faster Inspection & Watering
  • Flip-Top Rotates 360° for Easy Positioning
  • No Need to Remove Vent Cap from Battery
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • Water Level Indicator (Basket) for More Accurate Filling
  • Push-in Style with Rubber O-ring Seal (Included)
pdf iconBuy Now
3-GVCA-10703-gang Battery Speed Vent Caps

3-Gang Battery Speed Vent Caps


Purchase this product here
  • Allows Speedy Removal of all Battery Caps Simultaneously
  • Reduces Battery Maintenance Cost
  • Internal Spark-Flame Arrestors
  • Acid-Proof Rubber Seal Washers (Included)
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • Patent Pending Design
  • 1/4-Turn Bayonet Style Mount
  • Heavy Duty Construction
Buy Now
4-GVCA-10704-gang Battery Speed Vent Caps

4-Gang Battery Speed Vent Caps


Purchase this product here
  • Allows Speedy Removal of All Battery Caps Simultaneously
  • Reduces Battery Maintenance Cost
  • Internal Spark-Flame Arrestors
  • Acid-Proof Rubber Seal Washers (Included)
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • Patent Pending Design
  • 1/4-Turn Bayonet Style Mount
  • Heavy Duty Construction
Buy Now
2095
series
#2095 Flip-top Battery Vent Cap

2095 Series Battery Vent Caps


  • Available with or without Bottom Step on Diameter
  • Available with Flip-Top or Stationary-Top
  • Available with or without Water-Miser Feature
  • Water Level Indicator (Basket) for More Accurate Filling
  • Acid-Proof Rubber Seal Washer (Included)
  • 1/4-Turn Bayonet Style Mount
  • Custom Options are Available per Your Requirements
pdf iconPrice Inquiry
5000#5000 Push-in Battery Vent Cap

Flip-Top Battery Vent Cap


  • Water Level Indicator (Basket) for More Accurate Filling
  • Flip-Open Top Allows Faster Inspection & Watering
  • Push-in Style with Rubber O-ring Seal (Included)
pdf iconPrice Inquiry
1050WBattery Vent Cap Washer

Battery Vent Cap Washer


  • Our Standard Vent Cap Washer
  • Fits All Battery Vent Caps Listed Above Except for O-ring Type
  • 1.380 O.D. x .946 I.D. x .064 thick
  • Other Available Thicknesses: .075 (#1050W.075) and .110 (#1050W2)
  • Acid-Proof
pdf iconBuy Now

Showing all 20 results

  • 2095 Series Battery Vent Caps

    2095 Series Battery Vent Caps

    #2095 Series Battery Vent Caps
    Features:

    • Available with or without Bottom Step on Diameter
    • Available with Flip-Top or Stationary-Top
    • Available with or without Water-Miser Feature
    • Water Level Indicator (Basket) for More Accurate Filling
    • Acid-Proof Rubber Seal Washer (Included)
    • 1/4-Turn Bayonet Style Mount
    • Custom Options are Available per Your Requirements
  • Sale! Battery Speed Caps (#3-GVCA-1070)

    3-Gang Battery Speed Vent Caps

    $12.95 $8.00

    #3-GVCA-1070 3-Gang Battery Speed Vent Caps

    Features:

    • Allows Speedy Removal of all Battery Caps Simultaneously
    • Reduces Battery Maintenance Cost
    • Internal Spark-Flame Arrestors
    • Acid-Proof Rubber Seal Washers (Included)
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • Patent Pending Design
    • 1/4-Turn Bayonet Style Mount
    • Heavy Duty Construction

    Fits into the three bayonet battery openings that measure 2.680 inches (approx. 2-11/16) from the center of one hole to the center of the next. Please measure your battery before ordering.

    Quantity discount for 24 or more.
    Click here to inquire.

    PayPal seal

  • Sale! Battery Speed Caps #4GVCA1070

    4-Gang Battery Speed Vent Caps

    $14.95 $10.00

    #4-GVCA-1070 4-Gang Battery Speed Vent Caps

    Features:

    • Allows Speedy Removal of All Battery Caps Simultaneously
    • Reduces Battery Maintenance Cost
    • Internal Spark-Flame Arrestors
    • Acid-Proof Rubber Seal Washers (Included)
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • Patent Pending Design
    • 1/4-Turn Bayonet Style Mount
    • Heavy Duty Construction

    Fits into the four bayonet battery openings that measure 2.50 inches from the center of one hole to the center of the next. Please measure your battery before ordering.

    Quantity discount for 24 or more.
    Click here to inquire.

    PayPal seal

  • Battery Vent Cap Adapter #4D-8D-PIA

    4D-8D Battery Vent Cap Adapter PIA

    $1.70

    #4D-8D-PIA Battery Vent Cap Adapter

    Features:

    • Converts 3/4″ Diameter Hole to Accept 1/4-turn Bayonet Caps
    • Push-in Style (No seal required)

    Quantity discount for 250 or more.
    Click here to inquire.

    PayPal seal

  • Battery Vent Cap Adapter #4D-8D-SIA

    4D-8D Battery Vent Cap Adapter SIA

    $1.90

    #4D-8D-SIA Battery Vent Cap Adapter

    Features:

    • Converts 3/4″ Diameter Threaded Hole to Accept 1/4-turn Bayonet Caps
    • Screw-in Style with Rubber Seal (Included)

    Quantity discount for 250 or more.
    Click here to inquire.

    PayPal seal

  • Battery Cap Washer

    Battery Cap Washer

    $0.36

    The perfect replacement for your worn out battery speed vent cap washers. Our battery cap seal will fit all of our battery caps except for part #2075, #2085, & #5000 (those models use O-ring seals). When you purchase any of our vent caps, this washer is already included and does not need to be ordered separately. This gasket will also fit most other brands of battery caps, including speed vent style caps. To make sure they will fit your application, please measure your existing seals and compare it with the dimensions of our washer that are listed below. Our high performance battery cap seals are made of genuine Santoprene rubber for extra long life and superior durability. They are not affected by battery acid, and will remain highly flexible to provide lasting sealing properties. We have used them here in our factory on our forklift batteries for years, and we almost never need to replace them. In our experience, they generally will last the lifetime of the battery cap itself.

    This washer is available  in thicker versions: .075″ and .110″, contact us for more details.

    #1050W Battery Cap Washer
    Features:

    • Fits Most Battery Caps Except for O-ring Type
    • 1.380 O.D. x .946 I.D. x .064 thick
    • Acid-Proof

    (Minimum order is 25 washers)

  • Sale! Battery Speed Vent Caps Picture

    Battery Speed Vent Caps

    $8.00$10.00

    Features:

    • Allows Speedy Removal of all Battery Caps Simultaneously
    • Reduces Battery Maintenance Cost
    • Internal Spark-Flame Arrestors
    • Acid-Proof Rubber Seal Washers (Included)
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • Patented Design
    • 1/4-Turn Bayonet Style Mount
    • Heavy Duty Construction

    Click here to view the brochure and ordering instructions.

    PayPal seal

  • Battery Vent Cap Adapter #1050VCA

    Battery Vent Cap Adapter

    $1.70

    #1050VCA Battery Vent Cap Adapter

    Features:

    • DIN to Bayonet Adapter
    • Converts 1-3/8″ Diameter Hole to Accept 1/4-turn Bayonet Caps
    • Push-in Style with Rubber O-ring Seal (Included)

    Quantity discount for 250 or more.
    Click here to inquire.

    PayPal seal

  • Cell-Gard Flip-Top Battery Cap

    Cell-Gard Flip-Top Battery Vent Cap

    $3.00

    #2025 Cell-Gard Flip-Top Battery Vent Cap

    Features:

    • Flip-Open Top Allows Faster Inspection & Watering
    • Flip-Top Rotates 360° for Easy Positioning
    • No Need to Remove Vent Cap from Battery
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • Acid-Proof Rubber Seal Washer (Included)
    • Internal Spark-Flame Arrestor
    • 1/4-Turn Bayonet Style Mount

    Quantity discount for 100 or more.
    Click here to inquire.

    PayPal seal

  • Battery Vent Cap #5000

    Flip-Top Battery Vent Cap

    #5000 Flip-Top Battery Vent Cap

    This vent cap fits into a 1-3/8 inch (1.375″) diameter battery opening. Please measure before ordering.

    Features:

    • Water Level Indicator (Basket) for More Accurate Filling
    • Flip-Open Top Allows Faster Inspection & Watering
    • Push-in Style with Rubber O-ring Seal (Included)
  • Battery Vent Cap Adapter (M22x1.5)

    M22x1.5 Battery Vent Cap Adapter

    $2.00

    #SE2218 Battery Cap Adapter

    Features:

    • Converts M22x1.5 Threaded Hole to Accept 1/4-turn Bayonet Caps
    • Screw-in Style with Rubber O-ring Seal (Included)

    Quantity discounts available.
    Click here to inquire.

    PayPal seal

  • Battery Vent Cap Adapter (M27X3-SIA)

    M27X3-SIA Battery Vent Cap Adapter

    $2.00

    #M27X3-SIA Battery Vent Cap Adapter

    Features:

    • Converts M27-3 Threaded Hole to Accept 1/4-turn Bayonet Caps
    • Adapts #4000600 Level Indicator to fit Threaded Battery Hole
    • Screw-in Style with Rubber Seal (Included)

    Quantity discount for 250 or more.
    Click here to inquire.

    PayPal seal

  • Battery Vent Cap #1070

    Safety Battery Vent Cap

    $1.50

    #1070 Safety Battery Vent Cap

    Features:

    • 1/4-Turn Bayonet Style Mount
    • Acid-Proof Rubber Seal Washer (Included)
    • Contains Internal Flame Arrestor to Prevent Battery Explosions
    • Safety Tested & Certified by Independent Lab

    Click here to view the lab test report.

    Why pay extra for a vent cap that has an internal spark arrestor? Click here to find out why.

    Quantity discount for 500 or more.
    Click here to inquire.

    PayPal seal

  • Battery Vent Cap #1050

    Standard Battery Vent Cap

    $1.00

    #1050 Standard Battery Vent Cap

    Features:

    • 1/4-Turn Bayonet Style Mount
    • Acid-Proof Rubber Seal Washer (Included)

    Quantity discount for 500 or more.
    Click here to inquire.

    PayPal seal

  • Standard Flip-Top Battery Cap

    Standard Flip-Top Battery Vent Cap

    $1.90$2.25

    #2050 Standard Flip-Top Battery Vent Cap

    Features:

    • Flip-Open Top Allows Faster Inspection & Watering
    • Flip-Top Rotates 360° for Easy Positioning
    • No Need to Remove Vent Cap from Battery
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • Acid-Proof Rubber Seal Washer (Included)
    • 1/4-Turn Bayonet Style Mount

    Quantity discount for 100 or more.
    Click here to inquire.

    See the difference between Part #s here.

    PayPal seal

  • Standard Flip-Top Push-In Battery Cap

    Standard Flip-Top Push-In Battery Vent Cap

    $2.50

    #2075 Standard Flip-Top Push-in Battery Vent Cap

    This vent cap fits into a 1-3/8 inch (1.375″) diameter battery opening. Please measure before ordering.

    Features:

    • Flip-Open Top Allows Faster Inspection & Watering
    • Flip-Top Rotates 360° for Easy Positioning
    • No Need to Remove Vent Cap from Battery
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • Water Level Indicator (Basket) for More Accurate Filling
    • Push-in Style with Rubber O-ring Seal (Included)

    Quantity discount for 100 or more.
    Click here to inquire.

    PayPal seal

  • Standard Stationary-Top Battery Cap

    Standard Stationary-Top Battery Vent Cap

    $2.00

    #2050S Standard Stationary-Top Battery Vent Cap

    Features:

    • Acid-Proof Rubber Seal Washer (Included)
    • 1/4-Turn Bayonet Style Mount

    Quantity discount for 100 or more.
    Click here to inquire.

    PayPal seal

  • Water Miser Battery Cap

    Water Miser Battery Caps

    $3.98$5.38

    Features:

    • Water Miser Battery Vent Caps Reduce Evaporation
    • Internal Condenser Reduces Watering Intervals by up to 30%
    • Reduces Acid Fumes & Emissions
    • Keeps Top of Batteries Drier
    • Water Miser Caps Reduce Maintenance Costs
    • Internal Spark-Flame Arrestor
    • Acid-Proof Rubber Seal Washer (Included)
    • Flip-Open Top Allows Faster Inspection & Watering
    • Flip-Top Rotates 360° for Easy Positioning
    • No Need to Remove Vent Cap from Battery
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • 1/4-Turn Bayonet Style Mount

    Quantity discount for 100 or more Water Misers.
    Click here to inquire.

    See the difference between Part #s here.

    Which model should you choose?
    #2000 Our most popular model. Recommended for most applications.
    #2000C Larger opening for easier watering and level checking. Extra height reduces potential overflow.
    #2000EX Our tallest model. Maximum protection against potential overflow. Not suitable for limited space.

    PayPal seal

  • Water Miser Flip-Top Push-in Battery Cap

    Water Miser Flip-Top Push-in Battery Cap

    $5.00

    #2085 Water Miser Flip-Top Push-in Battery Cap

    This vent cap fits into a 1-3/8 inch (1.375″) diameter battery opening. Please measure before ordering.

    Features:

    • Internal Condenser Reduces Watering Intervals by up to 30%
    • Reduces Evaporation & Emissions
    • Reduces Maintenance Costs
    • Internal Spark-Flame Arrestor
    • Flip-Open Top Allows Faster Inspection & Watering
    • Flip-Top Rotates 360° for Easy Positioning
    • No Need to Remove Vent Cap from Battery
    • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
    • Water Level Indicator (Basket) for More Accurate Filling
    • Push-in Style with Rubber O-ring Seal (Included)

    Quantity discount for 100 or more.
    Click here to inquire.

    PayPal seal

  • Water Miser Stationary Battery Cap

    Water Miser Stationary-Top Battery Cap

    $4.00

    #2000S Water Miser Stationary-Top Battery Cap

    Features:

    • Water Miser’s Internal Condenser Reduces Watering Intervals by up to 30%
    • Reduces Evaporation & Emissions
    • Reduces Maintenance Costs
    • Internal Spark-Flame Arrestor
    • Acid-Proof Rubber Seal Washer (Included)
    • 1/4-Turn Bayonet Style Mount

    Quantity discount for 100 or more.
    Click here to inquire.

    PayPal seal