Westbrass Plastic Air Gap
4.6Editor score
Two pack value pricing
Standard plastic body
Chrome polished finish
In this guide
A dishwasher air gap is a crucial plumbing component that prevents contaminated water from flowing back into your clean dishwasher. It acts as a physical barrier ensuring that wastewater does not siphon back during drainage cycles. Choosing the right one protects your dishes from contamination and keeps your kitchen sanitary.
We evaluated ten top-rated air gaps and cover kits based on durability, design, and compatibility with standard sink decks. Our analysis focused on materials like solid brass and ABS plastic as well as finish quality and ease of installation. Each product offers unique benefits for different kitchen styles and plumbing needs.
Every pick below highlights key features, pros, and cons to help you find the perfect fit for your home. We included options ranging from full kits to stylish replacement covers in various finishes. Please note that prices and availability change frequently so check current listings before purchasing.
Top 3 Picks for Best Air Gap for Dishwasher
KRAUS Dishwasher Air Gap in Spot Free All-Brite Stainless Steel
4.8Editor score
Solid brass cover for durability
Corrosion resistant finish
Universal fit for all dishwashers
Dishwasher Air Gap Cover Solid Brass
4.8Editor score
Brushed nickel finish
Skirted design for aesthetics
Easy effortless installation
Top 10 Best Air Gap for Dishwasher in 2026 Compared
The following table provides a side by side comparison of all ten products featured in this guide. We highlight key specifications like material construction and finish to help you quickly identify the model that suits your sink deck and faucet style best.
ProductsSpecificationsEditor scorePrice
Editor's Choice
KRAUS Spot Free All-Brite Stainless Steel
9 inch overall height
Solid brass cover
ABS plastic body
1.75 inch cap diameter
4.8Editor score
Editor's Choice
2-Pack Silicone Splash Guard Cover
5.12 by 2.1 size
100 percent food grade silicone
Grey and black options
4 degree overflow spout
4.3Editor score
Best Premium
Solid Brass Overflow Vent Cap Kit
Brushed nickel finish
1.8 inch cap diameter
Curved top design
Skirted air gap cap
4.7Editor score
Westbrass Plastic Air Gap 2 Pack
Polished chrome finish
9 inch overall height
5/8 inch inlet
7/8 inch outlet
4.6Editor score
Air Gap Kit with Escutcheon
Polished chrome finish
ABS plastic body
Seven color options
Matching escutcheon included
4.6Editor score
Solid Brass Skirted Design Cover
Brushed nickel finish
1.80 inch diameter
Curved top prevents water
Stain resistant surface
4.8Editor score
Replacement Black Air Gap Dishwasher
Matte black finish
Standard universal size
Solid brass construction
Eight color options
4.7Editor score
Prime-Line MP53045 Dishwasher Cover
Stamped steel construction
Chrome plated finish
Easy push on installation
Fits most air gaps
4.5Editor score
KRAUS Dishwasher Air Gap Matte Black
Matte black finish
9 inch overall height
Solid brass cover
Corrosion resistant
4.8Editor score
Solid Brass Overflow Vent Cap Kit Matte Black
Matte black finish
1.8 inch cap diameter
ABS plastic body
Matching escutcheon included
4.7Editor score
1. KRAUS Dishwasher Air Gap in Spot Free All-Brite Stainless Steel – Best Overall Air Gap
KRAUS Dishwasher Air Gap in Spot Free All-Brite Stainless Steel
9 inch overall height
Solid brass cover
ABS plastic body
1.75 inch cap diameter
The KRAUS Air Gap stands out as the top choice for homeowners seeking reliability and style. With a 4.8 star rating it combines a durable ABS plastic body with a solid brass cover that resists rust. This unit prevents wastewater backflow effectively ensuring your dishes remain clean and safe.
Pros
- High quality stainless steel finish
- Includes all necessary components
- Strong corrosion resistance
- Matches most modern faucets
- Backed by one year warranty
Cons
- Higher price point than plastic
- Requires 1.5 inch hole
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Its spot free all brite stainless steel finish is designed to resist smudges and water spots keeping your sink deck looking pristine. The universal design fits all dishwasher models on the market and it includes a one year warranty for peace of mind. Installation is straightforward with standard dimensions.
While the price is higher than basic plastic models the longevity and aesthetic appeal justify the investment. The only minor drawback is the requirement for a pre drilled hole which may need minor adjustments if your sink lacks one. This is a common trade off for a quality fixture.
We recommend this air gap for those who value premium materials and a clean look. It is ideal for modern kitchens where the air gap will be visible near the faucet. Choosing this model ensures you meet plumbing codes while enjoying a high end finish that lasts.
Superior Material Construction
The combination of ABS plastic and solid brass ensures this unit withstands daily wear without corroding or fading over time.
Visual Harmony
The spot free finish complements stainless steel faucets and sinks reducing the need for constant cleaning of the exterior.
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2. 2-Pack Silicone Splash Guard Cover – Best Accessory for Leakage
2-Pack Silicone Splash Guard Cover
5.12 by 2.1 size
100 percent food grade silicone
Grey and black options
4 degree overflow spout
This product is a splash guard designed to work alongside your existing air gap to prevent water from dripping onto the counter. It features a 4 degree slope that directs flow into the sink reducing the mess behind the faucet. Made from food grade silicone it is safe and durable.
Pros
- Catches water drips effectively
- Safe food grade material
- Two pack value
- Easy to clean
- Complements existing air gap
Cons
- Not a standalone air gap
- Limited color options
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Reviewers appreciate the easy installation and how well it fits snugly around standard cover diameters. The grey and black colors blend well with most home decor styles offering a touch of elegance. It is particularly useful in households where small drips become a frequent annoyance.
Keep in mind this is an accessory and not a replacement for the actual air gap mechanism. It adds an extra layer of protection against wet counters but does not replace plumbing code requirements. Ensure your current setup allows for this additional cover before buying.
Ideal for those looking to solve minor leakage issues without replacing the entire fixture this guard is a practical buy. It protects your countertop and adds a clean look to your sink area. The two pack ensures you have a backup or can replace it when needed.
Moisture Management
The angled design ensures water flows directly into the sink basin keeping the surrounding deck dry and hygienic.
Easy Maintenance
Silicone material resists odors and is simple to wash with soap and water to maintain its appearance and function.
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3. Solid Brass Overflow Vent Cap Kit – Best Brushed Nickel Replacement
Solid Brass Overflow Vent Cap Kit
Brushed nickel finish
1.8 inch cap diameter
Curved top design
Skirted air gap cap
This kit offers a premium replacement cap with a brushed nickel finish that enhances your kitchen aesthetics. It is constructed from high quality brass with a durable ABS plastic body to ensure long term performance. The curved top design helps prevent water vapor from causing paint peeling or buildup.
Pros
- Elegant brushed nickel look
- Solid brass durability
- Prevents water vapor buildup
- Universal fit for most sinks
- No special tools needed
Cons
- Replacement cap only
- May not fit non standard sizes
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Installation is hassle free as it requires no special tools and fits flush with the countertop or sink deck. The skirted design covers the entire air gap body for a seamless look that complements any home decor. It effectively prevents backflow keeping your kitchen environment hygienic.
While it is a replacement cap rather than a full kit check your existing air gap dimensions carefully. The cap diameter is 1.8 inches which suits most standard models but verifying measurements is crucial before purchase. This ensures a perfect fit without gaps or leaks.
Choose this option if you want to update the look of your sink without replacing the whole unit. The brass construction provides excellent corrosion resistance making it a reliable choice for wet environments. It is a great value for upgrading your kitchen with a sleek finish.
Aesthetic Upgrade
The brushed nickel finish matches modern faucets and provides a cohesive look that elevates the sink area appeal.
Durability Features
Solid brass construction ensures the cap resists rust and maintains its shine even with frequent exposure to water.
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4. Westbrass Plastic Air Gap – Best Budget Air Gap
Westbrass Plastic Air Gap
Polished chrome finish
9 inch overall height
5/8 inch inlet
7/8 inch outlet
Westbrass offers a practical two pack of air gaps at an affordable price point suitable for tight budgets. These units feature a polished chrome finish and standard dimensions that fit most kitchen sinks and dishwashers. They are effective at preventing wastewater from backing up into your dishwasher system.
Pros
- Two pack value
- Low price point
- Standard specifications
- Polished chrome finish
- Easy installation
Cons
- Plastic body may crack
- Cap leaves lip exposed
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The plastic body is durable for typical use but lacks the premium feel of all metal units. Installation follows standard procedures with a 9 inch overall height and specific inlet outlet sizes for proper flow. This makes them a reliable choice for renters or secondary kitchens.
The cap design leaves the lip of the air gap body exposed which may not suit those seeking a flush look. However this is a minor trade off for the cost savings and functional reliability. It meets code requirements and performs well in standard drainage setups.
We recommend this for buyers prioritizing value and basic function over high end aesthetics. Having two units in the pack allows for replacements or use in multiple locations if needed. It is a solid entry level option for dishwasher safety and plumbing compliance.
Value Pack
Getting two units for the price of one offers extra value and convenience for future maintenance or replacements.
Standard Fit
Designed with standard inlet and outlet sizes this model ensures compatibility with most existing plumbing configurations.
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5. Air Gap Kit with Escutcheon – Best Value Kit
Air Gap Kit with Escutcheon
Polished chrome finish
ABS plastic body
Seven color options
Matching escutcheon included
This kit provides a complete solution with a polished chrome solid brass cap and a matching escutcheon. It is designed to prevent wastewater backflow while offering a clean flush look on your sink deck. The ABS plastic body is durable and the cap ensures reliable performance over time.
Pros
- Includes matching escutcheon
- Multiple color choices
- Solid brass cap
- Universal fit
- Hassle free installation
Cons
- Body is plastic not metal
- Installation requires care
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One of its standout features is the availability of seven color options allowing you to match your faucet or sink perfectly. The skirted design covers the entire air gap body for a sleek and sensible styling that complements any home decor. It is easy to install without special tools.
The only downside is the plastic body which may not feel as premium as all metal alternatives. However for the price and variety of finishes it offers excellent value for most homeowners. It effectively eliminates contamination risk and looks professional once installed.
Consider this kit if you want a full replacement that looks finished and matches your kitchen theme. The escutcheon adds a touch of elegance by hiding the hole around the air gap. It is a practical choice for upgrading an older or mismatched air gap system.
Customization Options
With seven color choices you can tailor the air gap appearance to fit your unique kitchen style and faucet finish.
Complete Package
Includes both the cap and escutcheon so you have everything needed for a professional looking installation without extra parts.
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6. Solid Brass Skirted Design Cover – Best Premium Cover
Solid Brass Skirted Design Cover
Brushed nickel finish
1.80 inch diameter
Curved top prevents water
Stain resistant surface
This cover exemplifies premium quality with a solid brass core and brushed nickel finish that resists corrosion. The skirted design covers the entire tubing for a clean aesthetic that matches modern kitchen styles. It prevents dirty water backflow ensuring a hygienic kitchen environment for your family.
Pros
- High quality solid brass
- Brushed nickel finish
- Skirted for clean look
- Easy maintenance
- Universal size fit
Cons
- Replacement cap only
- Requires existing air gap body
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The curved top prevents water accumulation which reduces the risk of paint peeling on your sink or countertop. It features a stain resistant surface that is easy to wipe down and maintain over the years. Installation is effortless as it slips securely onto the base without tools.
While it is a replacement part the build quality stands out compared to standard plastic caps. Ensure you measure your existing air gap height and diameter before buying to confirm compatibility. This is a minor step that ensures a perfect fit and secure connection.
Ideal for upgrading an existing air gap with a more durable and attractive cover this option is excellent. It is designed for longevity and does not leave water stains making it a top pick for quality. We recommend it for those seeking a premium upgrade to their sink deck.
Premium Material
Solid brass construction ensures the cover lasts longer and resists the wear and tear of a busy kitchen environment.
Sleek Aesthetic
The skirted design and brushed nickel finish create a sophisticated look that blends seamlessly with high end fixtures.
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7. Replacement Black Air Gap Dishwasher – Best Matte Black Cover
Replacement Black Air Gap Dishwasher
Matte black finish
Standard universal size
Solid brass construction
Eight color options
This cover provides a stylish matte black finish that stands out in modern and industrial kitchen designs. Made from solid brass it offers maximum durability and resistance to corrosion for long term performance. The skirted design covers the entire air gap body and installs flush for a clean look.
Pros
- Matte black finish
- Solid brass durability
- Skirted design
- Multiple color options
- Prevents backflow
Cons
- Replacement cap only
- Finish may vary slightly
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It fits most brand air gap bodies ensuring compatibility with standard installations without requiring custom parts. The eight color options allow you to find the exact match for your faucet or sink hardware. This versatility makes it a top choice for custom kitchen projects.
As with any replacement cap verify your existing air gap dimensions before purchasing to avoid fit issues. The matte finish may show fingerprints more than brushed finishes but it maintains a sleek appearance. It is a functional upgrade that improves the look of your sink area.
We recommend this for homeowners seeking a bold look to complement dark faucets or sinks. The brass construction ensures it stays reliable and rust free over time. It is a great way to update an older air gap with a modern and durable finish.
Modern Look
The matte black finish adds a contemporary touch that pairs beautifully with modern kitchen fixtures and cabinetry.
Solid Build
Constructed from solid brass this cover provides the strength needed to withstand daily kitchen moisture and use.
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8. Prime-Line MP53045 Dishwasher Cover – Best Basic Cover
Prime-Line MP53045 Dishwasher Cover
Stamped steel construction
Chrome plated finish
Easy push on installation
Fits most air gaps
The Prime-Line MP53045 is a straightforward cover made from stamped steel with a chrome plated finish. It is designed for push on installation over existing air gaps without needing tools or complicated steps. This makes it a quick fix for damaged or missing covers in your kitchen.
Pros
- Chrome plated finish
- Simple push on install
- Stamped steel material
- Fits most gaps
- Affordable pricing
Cons
- Stamped steel may rust
- Basic design
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While the material is less premium than solid brass it offers decent durability for typical indoor use. The chrome finish provides a shiny look that matches standard fixtures but may show wear over time. It is ideal for renters or those needing a temporary replacement solution.
Keep in mind that stamped steel can eventually rust if exposed to harsh moisture conditions frequently. However for occasional use or dry sink areas it performs well enough to vent air or water effectively. The price is low making it an accessible option for basic needs.
Choose this if you need a quick functional cover and do not require a high end finish. It fits most air gaps for dishwashers and is easy to replace when needed. It is a practical solution for maintaining air flow and preventing backflow issues.
Quick Install
The push on design allows you to replace a missing cover in minutes without any tools or plumbing skills.
Basic Protection
Provides essential coverage for your air gap to prevent debris entry and maintain proper ventilation function.
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9. KRAUS Dishwasher Air Gap Matte Black – Best Full Unit Matte Black
KRAUS Dishwasher Air Gap Matte Black
Matte black finish
9 inch overall height
Solid brass cover
Corrosion resistant
This unit is a complete air gap system with a solid brass cover and durable ABS plastic body. The matte black finish resists rust and corrosion ensuring a clean look that does not dull over time. It fits all dishwashers on the market and includes all components needed for installation.
Pros
- Full air gap unit
- Matte black finish
- Solid brass cover
- Includes body and cap
- One year warranty
Cons
- Higher cost than covers
- Requires drilling hole
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With a 4.8 star rating it delivers reliable performance in preventing wastewater backflow into your clean dishes. The design is universal and requires a 1.5 inch pre drilled hole for the cap to sit flush. It meets plumbing codes in many states for safe dishwasher connections.
The price is higher than simple covers but you get the full unit which simplifies the replacement process. The one year warranty and customer support add value and peace of mind for buyers. It is a robust choice for those needing a full system replacement.
We recommend this for homeowners upgrading their sink deck with a modern matte black finish. It offers durability and style in a single package that ensures compliance with safety standards. Choosing this model gives you a complete and reliable solution for your dishwasher setup.
Complete System
Includes both the body and cap so you have everything required to install a full air gap from scratch.
Reliable Performance
Designed to meet plumbing codes and prevent backflow it ensures your dishwasher operates safely and hygienically.
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10. Solid Brass Overflow Vent Cap Kit Matte Black – Best Matte Black Kit
Solid Brass Overflow Vent Cap Kit Matte Black
Matte black finish
1.8 inch cap diameter
ABS plastic body
Matching escutcheon included
This kit offers a high end matte black finish that elevates the look of your kitchen sink area. It features a solid brass cap with a matching escutcheon to cover the air gap body seamlessly. The design prevents water vapor buildup and maintains a flawless appearance over time.
Pros
- Matte black finish
- Includes escutcheon
- Solid brass cap
- Easy installation
- Universal fit
Cons
- Body is plastic not metal
- Check dimensions first
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Installation is hassle free with no special tools required to secure the cap to the sink deck. The cap diameter is 1.8 inches which suits most standard sinks and dishwashers on the market. It effectively prevents backflow ensuring your kitchen environment stays hygienic and clean.
While the body is made of ABS plastic the cap durability ensures long term reliability. The matte black finish is resistant to rust and corrosion making it suitable for wet environments. Ensure you measure your existing hole to confirm fit before ordering this replacement kit.
Choose this option for a stylish and functional upgrade that combines quality materials with a modern look. It is ideal for matching matte black faucets or sinks to create a cohesive kitchen design. We recommend it for those wanting a premium finish without replacing the full plumbing.
Modern Elegance
The matte black finish and skirted design provide a sophisticated look that enhances the overall sink aesthetic.
Practical Kit
Includes the escutcheon and cap so you have a complete package for a professional and seamless installation.
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Buying Guide – How to Choose the Best Air Gap for Dishwasher
Selecting the right air gap involves considering materials, design, and compatibility with your existing setup. This section breaks down the key factors to help you make an informed decision.
Material Quality
Look for solid brass caps or bodies as they offer superior durability and corrosion resistance compared to plastic. Brass maintains its appearance longer and is less likely to crack or wear out over time. Plastic bodies are acceptable but may need replacing sooner in harsh moisture conditions.
Prioritize models with metal construction for long term reliability and a premium feel.
Finish and Style
Choose a finish like brushed nickel, chrome, or matte black that matches your faucet or sink. The finish should be resistant to fingerprints and water spots to keep the sink area clean. Aesthetic compatibility ensures the air gap blends in rather than standing out as an eyesore.
Match the finish to your existing hardware for a cohesive and professional kitchen look.
Dimensions and Fit
Measure your sink deck hole size and existing air gap diameter before purchasing to ensure compatibility. Most units require a 1.5 inch pre drilled hole and have specific inlet outlet sizes. Universal designs are convenient but always verify measurements to avoid installation issues.
Double check dimensions to guarantee the cap fits securely and flush with your countertop.
Installation Ease
Opt for units that require no special tools or complex plumbing knowledge to install. Look for push on or snap fit designs that simplify the process for DIYers. A straightforward installation saves time and reduces the risk of improper connections.
Select a model designed for quick setup to minimize disruption during installation.
Code Compliance
Ensure the air gap meets local plumbing codes which often require a physical barrier for dishwasher drainage. Non compliant units may lead to failed inspections or issues with home insurance policies. Reliable products will state compliance in their product description or documentation.
Verify that the model meets your local plumbing regulations for safety and legal requirements.
Durability and Warranty
Check for warranties that cover defects or performance issues over a period of time. A one year warranty is standard for higher end models and indicates manufacturer confidence. Durable construction ensures the air gap withstands years of daily use without failure.
Look for warranties that guarantee performance and protect your investment in the long run.
Budget Considerations
Full kits cost more than simple replacement caps but offer better value if you need a complete system. Set a budget that balances quality and price based on your kitchen priorities. Cheaper options may save money upfront but could require more frequent replacement.
Balance the initial cost with expected lifespan to get the best value for your money.
Color Options
Some kits offer multiple color choices to match your specific decor needs better than standard finishes. This is useful for custom kitchens where standard chrome or brushed nickel does not fit. Having options allows for a more personalized and tailored look.
Consider kits with color variety if you need to match a unique kitchen theme.
How to Use and Care for Your Air Gap for Dishwasher
Once installed ensure the air gap cap is securely tightened and the escutcheon is flush with the sink. Check that both the inlet and outlet tubes are connected properly to prevent leaks or clogs. Regular visual inspection helps spot any signs of wear or damage early.
Clean the exterior with mild soap and water to remove water spots or soap scum. Use a soft cloth to avoid scratching the finish especially on matte or brushed metal. Avoid harsh chemicals that might degrade the material or finish over time.
Periodically remove the cap to clear any debris or clogs that may form inside the tube. This maintenance step keeps the air flow efficient and ensures the unit functions as intended. Replace the cap if it shows signs of cracking or excessive wear to maintain protection.
Frequently Asked Questions
What is the purpose of a dishwasher air gap?
A dishwasher air gap prevents contaminated wastewater from flowing back into your dishwasher during drainage. It acts as a physical barrier that meets plumbing codes and ensures your dishes remain clean and safe from sewage or sink water.
How do I know which size air gap I need?
Measure the diameter of your existing air gap hole and check the inlet outlet sizes of your plumbing. Most standard units fit a 1.5 inch hole but verify your sink deck dimensions before purchasing to ensure compatibility.
Can I replace just the cap of my air gap?
Yes if the body is intact you can replace just the cap with a matching model. Ensure the new cap fits the diameter and style of your existing air gap body to maintain function and appearance.
Are air gaps required by law?
Many local plumbing codes require a dishwasher air gap to prevent backflow into your kitchen sink. Check your local regulations to ensure compliance and avoid potential issues during home inspections or sales.
What material should I choose for the air gap cap?
Solid brass caps offer the best durability and corrosion resistance compared to plastic options. Brass maintains its finish longer and is more resistant to water damage over time.
How do I clean a dishwasher air gap cap?
Use mild soap and warm water with a soft cloth to wipe down the exterior. Avoid abrasive cleaners or scrubbers that might scratch the finish or damage the surface.
Why does my air gap leak?
Leaks often occur due to clogs in the tubes or improper installation of the cap. Check for debris blockages and ensure all connections are tight and aligned correctly.
Can I install an air gap without a professional?
Yes many air gap kits are designed for DIY installation with basic tools. If you are comfortable with basic plumbing you can install it yourself following the included instructions.
Final Thoughts on Choosing the Best Air Gap for Dishwasher
We highlighted ten excellent air gap and cover options ranging from full kits to stylish replacements. Each choice offers unique benefits whether you prioritize budget durability or premium finishes. The KRAUS models lead in quality while the Westbrass pack offers great value.
When selecting your model prioritize compatibility with your sink deck and faucet style to ensure a seamless look. Solid brass construction provides longevity while finishes like matte black or brushed nickel elevate your kitchen aesthetic.
Remember to verify current prices and availability before making your purchase as they fluctuate often. Taking the time to choose the right air gap ensures your kitchen remains safe compliant and stylish for years to come.