Westbrass Plastic Air Gap
4.6Editor score
Standard air gap cap included
Plastic body for durability
Polished chrome finish
In this guide
An air gap for dishwasher installations is a critical component that prevents contaminated water from flowing back into your clean dishes. This small device ensures hygiene and complies with plumbing codes in many regions. Choosing the right model protects your kitchen investment and maintains a spotless appearance on your sink deck.
We evaluated ten highly rated air gap units based on build quality, design, compatibility, and user feedback. Our analysis focuses on materials like brass and plastic, finish durability, and ease of installation. Each product offers unique benefits ranging from budget-friendly options to premium brushed nickel designs.
Each pick highlights specific strengths such as corrosion resistance, universal fit, or aesthetic appeal. While prices may fluctuate due to market conditions, the core features remain consistent. Read on to find the perfect air gap that matches your sink style and functional needs today.
Top 3 Picks for Best Air Gap for Dishwasher
KRAUS Dishwasher Air Gap
4.8Editor score
Solid brass cover construction
Corrosion resistant finish
Universal design compatibility
Dishwasher Air Gap Cover
4.8Editor score
Solid brass core material
Skirted design aesthetic
Brushed nickel finish
Top 10 Best Air Gap for Dishwasher in 2026 Compared
This side by side comparison highlights the key specifications and features of each air gap model to help you make an informed decision for your kitchen sink setup.
ProductsSpecificationsEditor scorePrice
Editor's Choice
KRAUS Dishwasher Air Gap
Solid brass cover body
Nine inch overall height
Corrosion resistant finish
One year warranty
4.8Editor score
Editor's Choice
Dishwasher Air Gap Cover
Silicone splash guard material
Two color options available
Four degree slope design
Five point one two inch size
4.3Editor score
Best Premium
Dishwasher Air Gap Cover
Solid brass cap construction
Brushed nickel finish
Curved top design
Universal fit size
4.7Editor score
Westbrass Plastic Air Gap
Standard air gap cap
Polished chrome finish
Plastic body included
Nine inch overall height
4.6Editor score
Dishwasher Air Gap Kits
Solid brass air gap cap
Polished chrome finish
Matching escutcheon included
Seven color options
4.6Editor score
Dishwasher Air Gap Cover
Solid brass core material
Brushed nickel finish
Skirted design aesthetic
Universal size compatibility
4.8Editor score
Dishwasher Air Gap Cover
Matte black finish
Solid brass construction
Skirted design style
Eight color options
4.7Editor score
Prime-Line MP53045
Stamped steel construction
Chrome plated finish
Single pack quantity
Easy push on install
4.5Editor score
KRAUS Dishwasher Air Gap
Matte black finish
Solid brass cover
Corrosion resistant material
One year warranty
4.8Editor score
Dishwasher Air Gap Cover
Matte black finish
Solid brass construction
Curved top design
Universal fit size
4.7Editor score
1. KRAUS Dishwasher Air Gap – Best Overall Air Gap
KRAUS Dishwasher Air Gap
Solid brass cover material
Corrosion resistant finish
Universal design compatibility
One year warranty
This KRAUS air gap is a top rated choice with a 4.8 star rating for preventing wastewater backup. Its solid brass cover and corrosion resistant finish make it a durable option for modern kitchens. Users appreciate the clean look that installs flush with the sink deck.
Pros
- Superior durability
- Clean look design
- Code compliance assured
- Rust resistant finish
- Universal fit
Cons
- Price point higher
- Requires specific hole size
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The unit features a premium corrosion resistant finish that will not dull or fade over time. It includes a durable ABS plastic body and solid brass cover for reliable performance. The design is universal and compatible with all dishwashers on the market.
Installation requires a pre drilled hole size of 1.5 inches which may need verification. The overall height with plastic body is 9 inches with a cap height of 2.5 inches. While effective, it comes at a higher price point than basic plastic models.
Buy this if you need a high end appearance with strong corrosion resistance. It is ideal for homeowners who value aesthetics and long term reliability in their kitchen fixtures. The one year warranty provides additional peace of mind for your purchase.
Premium Build Quality
The solid brass cover offers superior durability and a high end appearance that complements kitchen faucets.
Code Compliance
Air gaps are required for dishwasher installations by plumbing codes in many states ensuring legal compliance.
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2. Dishwasher Air Gap Cover – Best Silicone Splash Guard
Dishwasher Air Gap Cover
Food grade silicone material
Two color choices
Four degree slope design
Five point one two inch size
This silicone splash guard offers a practical solution for preventing water from splashing all over your counter tops. With a 4.3 star rating it fits snugly around most air gap cover diameters to catch drips. The 4 degree slope helps water drain efficiently into the sink.
Pros
- Prevents water splashing
- Easy to clean
- Stylish accessory
- Two color options
- Food grade safe
Cons
- Accessory only not full gap
- Lower rating than others
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Made from 100 percent food grade silicone this accessory is safe and odorless for kitchen use. It is more durable and easy to clean than other materials ensuring long lasting use. You can choose between grey or black to match your sink decor.
Note that this is an accessory cover and not a full air gap unit. It measures 5.12 by 2.1 inches with an inner hole size of 1.5 inches. While helpful for mess control it does not replace the primary air gap function.
Buy this if you need to reduce wiping down your counter tops frequently. It is perfect for homeowners who want to enhance the overall aesthetic of their kitchen sink area. This accessory complements existing air gaps effectively.
Efficient Drainage
The 4 degree slope helps water drain better reducing wet mess behind the sink.
Aesthetic Appeal
Stylish grey or black options blend seamlessly with home decor for a timeless look.
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3. Dishwasher Air Gap Cover – Best Brushed Nickel Cap
Dishwasher Air Gap Cover
Solid brass cap material
Brushed nickel finish
Curved top design
Universal fit size
This solid brass cap features a brushed nickel finish that enhances the visual appeal of your kitchen. With a 4.7 star rating it prevents wastewater from backing up into your dishwasher effectively. The curved top design prevents water vapor buildup and maintains a flawless appearance.
Pros
- Efficient backflow prevention
- Premium brass construction
- Elegant design style
- Curved top prevents buildup
- Hassle-free installation
Cons
- Replacement kit only
- Check existing hole size
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It includes a matching escutcheon that covers the entire air gap body for a clean look. The cap diameter is 1.8 inches with pipes measuring 7/8 and 5/8 inches in diameter. Installation requires no special tools and is designed for easy setup.
You should verify your existing air gap body height and diameter before purchasing this cap. The skirted cap installs flush with the sink deck or countertop. While it is a replacement kit it offers a classic and sensible design.
Buy this if you need a high end replacement for your existing air gap body. It suits homeowners who want to upgrade the look of their sink deck without full replacement. The brass construction ensures excellent durability and corrosion resistance.
Elegant Design
The brushed nickel finish and curved top design complement any home decor aesthetically.
Installation Ease
Designed for easy setup it requires no special tools allowing quick secure installation.
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4. Westbrass Plastic Air Gap – Best Budget Air Gap
Westbrass Plastic Air Gap
Standard air gap cap
Polished chrome finish
Plastic body included
Nine inch overall height
This 2 pack offers standard air gap caps with a polished chrome finish for a classic look. With a 4.6 star rating it is an affordable choice for basic dishwasher plumbing needs. The cap diameter is 1.625 inches with a height of 2.25 inches.
Pros
- Affordable price
- Standard cap included
- Two pack value
- Polished chrome finish
- Simple design
Cons
- Plastic body material
- Cap leaves lip exposed
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It includes a plastic body with 5/8 inch inlet and 7/8 inch outlet on the air gap body. The cap leaves the lip of the air gap body exposed when installed which may affect aesthetics. Overall height with plastic body is 9 inches.
This option is best for those who need a replacement cap quickly without breaking the bank. It is designed for standard applications where high end aesthetics are not the primary concern. The two pack provides value if you have multiple units to replace.
Buy this if you need a functional and economical air gap replacement. It suits contractors or homeowners looking for a straightforward solution without extra features. The polished chrome finish helps it blend with common kitchen fixtures.
Value Pack
The two pack configuration offers value for those needing multiple replacements at once.
Standard Fit
Standard dimensions ensure compatibility with most existing air gap bodies on the market.
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5. Dishwasher Air Gap Kits – Best Replacement Kit
Dishwasher Air Gap Kits
Solid brass air gap cap
Polished chrome finish
Matching escutcheon included
Seven color options
This kit includes a solid brass air gap cap with polished chrome finish and matching escutcheon. With a 4.6 star rating it prevents wastewater from backing up into your dishwasher reliably. The skirted air gap cap covers the entire air gap body for a clean look.
Pros
- Universal air cap kit
- Built to last durability
- Easy to install
- Multiple color choices
- Classic design style
Cons
- Replacement cap only
- Verify existing body
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It features a durable ABS plastic body and solid brass construction cap for maximum durability. The design is resistant to corrosion and rust offering years of reliable performance. You can choose from seven color options to match your kitchen sink.
It is designed for hassle-free installation to complement any home style. Ensure your existing air gap body matches the standard dimensions before purchase. The classic design is sensible and offers value for money for replacements.
Buy this if you need a complete replacement kit with color flexibility. It is ideal for homeowners who want to update their sink deck aesthetic easily. The polished chrome finish provides a timeless and reliable look.
Color Variety
Choose from seven color options to perfectly match your kitchen sink and faucet.
Durability Focus
Solid brass construction and ABS plastic ensure maximum durability against corrosion and rust.
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6. Dishwasher Air Gap Cover – Best Premium Brushed Nickel
Dishwasher Air Gap Cover
Solid brass core material
Brushed nickel finish
Skirted design aesthetic
Universal size compatibility
This air gap cover combines a solid brass core with a brushed nickel finish for excellent corrosion resistance. With a 4.8 star rating it prevents dirty water from flowing back into the dishwasher. The curved top prevents water accumulation to avoid paint peeling on the sink deck.
Pros
- Powerful backflow prevention
- Solid brass longevity
- Skirted design aesthetics
- Curved top prevents paint peeling
- Effortless installation
Cons
- Replacement cover only
- Check existing height
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It features a skirted cap design covering the entire air gap tubing for a clean look. Standard dimensions include a cap diameter of 1.80 inches and height of 2.28 inches. It fits most air gap bodies of dishwashers when verified prior to purchase.
The removable design simplifies routine maintenance and blockage clearing for long term use. Installation is effortless as you simply slip the cover onto the air gap base. The smooth surface allows easy cleaning and does not leave water stains.
Buy this if you want a high-end replacement that ensures long-term functionality. It suits homeowners who prioritize a brushed nickel finish and solid brass quality. The skirted design adds a touch of elegance to your kitchen sink.
Premium Materials
Engineered for longevity this air gap cover combines a solid brass core with brushed nickel finish.
Aesthetic Design
The skirted cap covers entire tubing and installs flush for a clean modern look.
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7. Dishwasher Air Gap Cover – Best Matte Black Option
Dishwasher Air Gap Cover
Matte black finish
Solid brass construction
Skirted design style
Eight color options
This matte black finish option is perfect for modern kitchens using black fixtures. With a 4.7 star rating it offers a classic and sensible styling that complements any home. The skirted air gap cap covers the entire air gap body for a clean look.
Pros
- Universal standard size
- Classic design appeal
- Built to last
- Multiple color options
- Easy to install
Cons
- Replacement cap only
- Check existing body
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It is built to last with solid brass construction that resists corrosion and rust. You can choose from eight color options to perfectly match your kitchen sink and faucet. The design installs flush to the sink deck or countertop.
It is a standard air gap cap only that fits most brand's air gaps bodies. This model provides value for money with longer service life than cheaper alternatives. Installation is designed for hassle-free setup without special tools.
Buy this if you need a durable replacement that matches black kitchen hardware. It suits homeowners who want a classic yet modern aesthetic for their sink deck. The matte black finish ensures a sleek and coordinated appearance.
Modern Finish
Matte black finish complements modern black fixtures for a coordinated kitchen look.
Versatility
Eight color options available to match your specific kitchen sink and faucet styles.
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8. Prime-Line MP53045 – Best Steel Cover Option
Prime-Line MP53045
Stamped steel construction
Chrome plated finish
Single pack quantity
Easy push on install
This cover is constructed from stamped steel with a chrome plated finish for durability. With a 4.5 star rating it is designed to fit over most air gaps for dishwashers. It includes a single air gap cover for your plumbing needs.
Pros
- Stamped steel material
- Chrome plated finish
- Easy push on install
- Fits most gaps
- Single pack option
Cons
- Steel may rust if not coated
- Basic design only
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The easy push on installation over the air gap of your dishwasher requires minimal effort. It vents air or water from your dishwasher to prevent contamination issues. The design focuses on simple functionality rather than aesthetic upgrades.
It is a budget friendly option for those who need a basic cap replacement. While steel is durable the finish is key to preventing rust in wet environments. If you want a simple cover this product delivers basic performance.
Buy this if you need a straightforward and functional cover replacement. It suits users who prefer standard steel construction over brass. The chrome plated finish offers a clean look at a reasonable price.
Steel Construction
Constructed from stamped steel this cover offers solid durability for daily use.
Simple Installation
Easy push on installation over the air gap of your dishwasher without tools.
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9. KRAUS Dishwasher Air Gap – Best Matte Black Air Gap
KRAUS Dishwasher Air Gap
Matte black finish
Solid brass cover
Corrosion resistant material
One year warranty
This KRAUS unit features a matte black finish to match modern black fixtures perfectly. With a 4.8 star rating it includes a durable ABS plastic body and solid brass cover. The premium corrosion resistant finish will not dull or fade over time.
Pros
- Solid brass cover material
- Corrosion resistant finish
- Universal design compatibility
- Clean look design
- One year warranty
Cons
- Price point higher
- Requires specific hole size
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It prevents wastewater from backing up into your dishwasher eliminating contamination risk. The universal design is compatible with all dishwashers on the market. The cap covers the entire air gap body and installs flush to the sink deck.
Installation requires a pre drilled hole size of 1.5 inches which needs verification. The overall height with plastic body is 9 inches with a cap height of 2.5 inches. It comes with a one year warranty satisfaction guaranteed with support.
Buy this if you need a high-end matte black air gap for style. It is ideal for homeowners who value aesthetics and long term reliability in their kitchen. The one year warranty provides additional peace of mind for your purchase.
Matte Black Finish
Premium corrosion resistant finish will not dull or fade over time.
Reliability
Solid brass cover offers superior durability and a high-end appearance.
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10. Dishwasher Air Gap Cover – Best Matte Black Cap
Dishwasher Air Gap Cover
Matte black finish
Solid brass construction
Curved top design
Universal fit size
This solid brass cap features a matte black finish that enhances the visual appeal of your kitchen. With a 4.7 star rating it prevents wastewater from backing up into your dishwasher effectively. The curved top design prevents water vapor buildup and maintains a flawless appearance.
Pros
- Efficient backflow prevention
- Premium brass construction
- Elegant design style
- Curved top prevents buildup
- Hassle-free installation
Cons
- Replacement kit only
- Check existing hole size
We may earn a commission when you buy through this link, at no additional cost to you.
It includes a matching escutcheon that covers the entire air gap body for a clean look. The cap diameter is 1.8 inches with pipes measuring 7/8 and //8 inches in diameter. Installation requires no special tools and is designed for easy setup.
You should verify your existing air gap body height and diameter before purchasing this cap. The skirted cap installs flush with the sink deck or countertop. While it is a replacement kit it offers a classic and sensible design.
Buy this if you need a high end replacement for your existing air gap body. It suits homeowners who want to upgrade the look of their sink deck without full replacement. The brass construction ensures excellent durability and corrosion resistance.
Matte Black Finish
The matte black finish and curved top design complement any home decor aesthetically.
Installation Ease
Designed for easy setup it requires no special tools allowing quick secure installation.
We may earn a commission when you buy through this link, at no additional cost to you.
Buying Guide – How to Choose the Best Air Gap for Dishwasher
Choosing the right air gap involves considering build quality finish design and compatibility to ensure it meets your plumbing needs and kitchen style.
Build Quality
The material used for the air gap cap determines its durability and resistance to corrosion. Look for solid brass caps which offer superior durability compared to plastic alternatives. These materials resist rust and ensure long term performance in a wet environment.
Prioritize solid brass construction for maximum durability and reliable performance.
Finish Selection
Finishes like brushed nickel polished chrome or matte black help the air gap blend with your faucet. A good finish should be corrosion resistant so it does not dull or fade over time. This maintains the aesthetic appeal of your kitchen sink deck for years.
Select a finish that matches your faucet and resists corrosion for lasting beauty.
Design Features
Modern designs often include skirted caps that cover the entire air gap body for a clean look. Curved top designs can help prevent water vapor buildup reducing the risk of paint peeling. These features enhance the visual appeal and protect your countertop from moisture.
Look for skirted caps and curved tops to enhance aesthetics and prevent water damage.
Compatibility
Ensure the air gap unit is compatible with your existing air gap body and dishwasher model. Universal designs are available to fit most dishwashers on the market effectively. Always check dimensions such as cap diameter and hole size before purchasing to avoid issues.
Verify universal compatibility and measure dimensions to ensure proper fit.
Installation Ease
Ideally an air gap kit should allow for hassle-free installation without requiring special tools. Some models come with matching escutcheons that install flush to the sink deck. This simplifies the setup process and reduces the time needed for plumbing adjustments.
Choose models designed for easy setup without needing special tools.
Code Compliance
Air gaps are required for dishwasher installations by plumbing codes in many states. Using a compliant unit ensures your kitchen meets safety and legal standards. This prevents issues with inspections and helps maintain a hygienic kitchen environment.
Confirm the unit meets local plumbing codes to avoid compliance issues.
Maintenance
Removable designs can simplify routine maintenance and blockage clearing when needed. Smooth stain-resistant surfaces allow for easy cleaning and keep the unit looking new. Regular maintenance ensures the air gap functions correctly over its service life.
Opt for removable and stain-resistant designs to simplify routine maintenance.
Warranty and Support
Products with warranties like a one year warranty offer satisfaction guaranteed protection. Best-in-industry customer support can help you resolve issues quickly if they arise. This adds value and peace of mind to your purchase decision.
Check for warranty coverage and customer support options for added value.
How to Use and Care for Your Air Gap for Dishwasher
Regularly check the air gap for any signs of clogging or buildup that may prevent water drainage. This small device prevents wastewater from backing up into your dishwasher. Keeping it clear ensures hygiene and compliance with plumbing standards.
Clean the exterior surfaces with a mild cleaner to maintain the finish. Avoid abrasive chemicals that could dull or fade premium finishes like polished chrome. This keeps the air gap looking its best over time.
If you notice water leaking from the air gap consult a plumber immediately. Persistent issues may indicate a blockage in the drain line requiring professional attention. Regular checks help you catch these issues before they affect your kitchen.
Frequently Asked Questions
Why do dishwashers need an air gap?
An air gap prevents wastewater from backing up into your dishwasher which eliminates contamination risks. It is a critical component that keeps your clean dishes safe from dirty water. Many plumbing codes require this device for proper dishwasher installation and hygiene.
How do I know which air gap fits my kitchen?
Measure the diameter of your sink deck hole which is typically 1.5 inches. Check the dimensions of your existing air gap body to find a matching cap. Universal designs are available to fit most dishwashers and standard sink setups effectively.
What is the difference between brass and plastic air gaps?
Solid brass caps offer superior durability and corrosion resistance compared to plastic. Plastic is lighter and more affordable but may not last as long. Choose brass for high end looks and long term reliability in your kitchen.
Can I install an air gap without professional help?
Many models are designed for hassle-free installation without special tools. Follow the product instructions carefully to secure the cap and escutcheon properly. If you are unsure consult a plumber to ensure compliance with local codes.
How often should I clean my dishwasher air gap?
Clean the exterior regularly and check for clogs monthly to prevent backups. Use a mild cleaner to protect the finish and maintain its appearance. Prompt maintenance ensures the unit functions effectively over time.
Do all states require an air gap for dishwashers?
Air gaps are required by plumbing codes in many states to ensure hygiene and safety. Local regulations may vary so check with your local building department. Installing a compliant unit helps you avoid legal issues during inspections.
Final Thoughts on Choosing the Best Air Gap for Dishwasher
Our top picks include the KRAUS Dishwasher Air Gap for durability and the Westbrass model for budget needs. Each product offers unique features like corrosion resistance and elegant design to suit your kitchen. Selecting the right one ensures your dishwasher stays clean and compliant.
Prioritize build quality and finish compatibility to ensure a seamless look on your sink deck. Look for solid brass construction and universal fit to avoid future replacement issues. A good air gap is an investment in your kitchen hygiene and aesthetics.
Prices may vary so check current listings for the best value before purchasing. Always verify compatibility with your existing plumbing and sink measurements. Finding the perfect unit today can save you time and trouble tomorrow.