Westbrass Plastic Air Gap
4.6Editor score
Durable plastic body
Chrome finish
Standard sizing
In this guide
An air gap for dishwasher is a critical plumbing component that prevents dirty wastewater from flowing back into your clean dishes. It ensures hygiene and complies with many local building codes.
We evaluated ten highly rated options based on durability, design, ease of installation, and customer feedback. Our list includes full kits and replacement covers to suit every kitchen setup.
Each pick highlights key features and real-world performance. Remember that availability and pricing can shift frequently, so always check current listings before making your final decision.
Top 3 Picks for Best Air Gap for Dishwasher
KRAUS Dishwasher Air Gap
4.8Editor score
Solid brass cover
Stainless steel look
Code compliant
Dishwasher Air Gap Cover Kit
4.7Editor score
Brushed nickel finish
Curved top design
Complete kit
Top 10 Best Air Gap for Dishwasher in 2026 Compared
The following table provides a side-by-side overview of each model to help you quickly identify the right fit for your sink and faucet.
ProductsSpecificationsEditor scorePrice
Editor's Choice
KRAUS Stainless Steel Air Gap
Solid brass cover
9 inch overall height
1 1/2 inch hole
Stainless steel finish
4.8Editor score
Editor's Choice
2-Pack Silicone Splash Guard
Food grade silicone
Grey and black
1 5 inch hole
4 degree slope
4.3Editor score
Best Premium
Dishwasher Air Gap Cover Kit
High quality brass
Brushed nickel
1 8 inch diameter
Skirted cap
4.7Editor score
Westbrass Plastic Air Gap
Plastic body
Polished chrome
2 pack
Standard size
4.6Editor score
Dishwasher Air Gap Kit Chrome
Solid brass cap
Polished chrome
Universal fit
Seven colors
4.6Editor score
Solid Brass Air Gap Cap
Solid brass core
Brushed nickel
Skirted design
1 8 inch cap
4.8Editor score
Dishwasher Air Gap Cover Black
Solid brass
Matte black
Skirted cap
Eight colors
4.7Editor score
Prime-Line Dishwasher Air Gap
Stamped steel
Chrome plated
Single pack
Push on
4.5Editor score
KRAUS Matte Black Air Gap
Solid brass cover
Matte black
9 inch height
Universal design
4.8Editor score
Matte Black Air Gap Kit
High quality brass
Matte black
1 8 inch cap
Curved top
4.7Editor score
1. KRAUS Dishwasher Air Gap – Best Overall Air Gap
KRAUS Dishwasher Air Gap
Solid brass cover
Durable ABS plastic
Stainless steel look
One year warranty
This KRAUS unit stands out as a top tier option for homeowners seeking reliability and style. With a 4.8 rating from users, it effectively prevents wastewater from backing up into your dishwasher, keeping your dishes clean and safe.
Pros
- High end appearance
- Prevents wastewater backup
- Corrosion resistant finish
- Universal design
- Flush install option
Cons
- Specific hole size needed
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The solid brass cover offers superior durability and a high end appearance that complements any kitchen faucet. The premium corrosion resistant finish ensures it will not dull or fade over time, maintaining its Spot Free look for years of use.
While the pre drilled hole size requirement is specific at 1 1/2 inches, this standardizes installation for most sinks. The clean look of the cap covering the entire body installs flush to the sink deck for a polished aesthetic.
Anyone upgrading their kitchen plumbing should consider this kit for its balance of code compliance and visual appeal. The 1 year warranty and best in industry customer support add peace of mind to your purchase.
Superior Durability
The combination of a durable ABS plastic body and a solid brass cover provides a lifetime of reliable performance in tough kitchen environments.
Code Compliance
Air gaps are required for dishwasher installations by plumbing codes in many states, making this unit a necessary and compliant choice.
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2. 2-Pack Silicone Splash Guard – Best Accessory
2-Pack Silicone Splash Guard
Food grade silicone
Measures 5 12 by 2 1
Inner hole 1 5 inch
Two color choices
This accessory serves as an excellent solution for catching drips and directing water flow into the sink. Its 4.3 rating reflects user satisfaction with how well it reduces the need to wipe down countertops frequently.
Pros
- Prevents counter mess
- Adds elegance
- Drains water efficiently
- Easy to clean
- Odorless material
Cons
- Accessory only
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Made from 100 percent food grade silicone, it is safe, odorless, and more durable than many other materials. The 4 degree slope helps water drain better, keeping your countertop dry and clean behind the sink area.
It fits snugly around most air gap cover diameters with an inner hole size of 1 5 inches. The stylish grey or black colors blend seamlessly with your home decor to enhance the overall aesthetic.
Use this item as a helpful add-on to your existing setup to maintain a tidy kitchen. It is a simple way to prevent water from splashing all over without replacing your entire plumbing fixture.
Effective Water Management
The splash guard catches water from the air gap cover and drips them into the sink, significantly reducing wet mess and maintenance.
Elegant Aesthetic
Its timeless colors and perfect size add a touch of elegance to your kitchen or bathroom decor as a stylish accessory.
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3. Dishwasher Air Gap Cover Kit – Best Premium Finish
Dishwasher Air Gap Cover Kit
Premium brass construction
Brushed nickel finish
1 8 inch diameter
Skirted cap design
This kit is designed to prevent wastewater from backing up into your dishwasher while adding a high end look. With a 4.7 rating, users appreciate the durable ABS plastic body combined with a high quality brass cap.
Pros
- Efficient backflow prevention
- Curved top design
- Prevents vapor buildup
- Easy installation
- Universal fit
Cons
- Replacement cap only
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The brushed nickel finish enhances the visual appeal of your kitchen and features a curved top design that prevents water vapor buildup. This reduces the risk of paint peeling and maintains a flawless appearance over time.
The skirted cap along with the matching escutcheon covers the entire air gap body. It installs flush with the sink deck or countertop for a clean appearance that complements any home decor style.
Ideal for homeowners looking to upgrade the look of their plumbing fixtures, this cap is easy to install without special tools. Its classic and sensible design makes it a versatile choice for most kitchen sinks.
Corrosion Resistance
The combination of brass and ABS plastic ensures exceptional durability and resistance to corrosion in humid kitchen environments.
Hassle Free Setup
Enjoy a quick setup process with no special tools required to securely install it to your sink deck with minimal effort.
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4. Westbrass Plastic Air Gap – Best Budget Option
Westbrass Plastic Air Gap
Plastic body
Polished chrome
2 pack value
Standard cap diameter
This 2-pack offers a practical and budget friendly solution for standard air gap needs. With a 4.6 rating, it provides the essential components required to prevent backflow effectively in most kitchen setups.
Pros
- Standard air gap cap
- Chrome finish
- Complete included kit
- Value pack
- Reliable performance
Cons
- Lip exposed when installed
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The plastic body is durable and the polished chrome finish adds a touch of style. The cap diameter is 1-5/8 inches with a height of 2-1/4 inches, fitting standard requirements for many dishwashers.
While the cap leaves the lip of the air gap body exposed when installed, it remains a reliable choice for those prioritizing function over a fully covered look. The 9-inch overall height ensures adequate clearance.
Buyers looking for a no fuss replacement or new installation will find this set to be a sensible value. The two pack allows for spares or future needs, making it a cost effective purchase for any home.
Standard Compatibility
Designed to fit standard air gaps, this unit includes a plastic body and cap that work well with most dishwasher models.
Functional Design
The simple design focuses on utility with a chrome finish that resists tarnishing in normal kitchen conditions.
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5. Dishwasher Air Gap Kit Chrome – Best Classic Style
Dishwasher Air Gap Kit Chrome
Solid brass cap
Polished chrome
Matching escutcheon
Universal air cap
This kit is a reliable choice for preventing contamination and ensuring clean dishes. With a 4.6 rating, users appreciate the durable ABS plastic body and solid brass construction cap that offers years of reliable performance.
Pros
- Prevents wastewater backup
- Skirted cap
- Seven color options
- Built to last
- Easy to install
Cons
- Specific color availability
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The skirted air gap cap with the matching escutcheon covers the entire air gap body for a clean look. It installs flush to the sink deck or countertop, blending seamlessly with your kitchen design.
You can choose from seven color options to perfectly match your kitchen sink and faucet, offering flexibility for various styles. The design is universal and fits most of dishwashers with standard plumbing connections.
Ideal for homeowners seeking a balance of function and aesthetics, this kit is easy to install. The polished chrome finish is resistant to corrosion and rust, providing value for money and a longer service life.
Customizable Fit
With seven color options, you can select the perfect finish to complement your existing kitchen fixtures and decor.
Classic Styling
The classic and sensible styling of the skirted cap and escutcheon enhances any home with a polished appearance.
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6. Solid Brass Air Gap Cap – Best Brushed Finish
Solid Brass Air Gap Cap
Solid brass core
Brushed nickel
Skirted design
1 8 inch diameter
This cover effectively prevents dirty water from flowing back into the dishwasher and avoids cross-contamination. It has earned a 4.8 rating due to its high quality construction and reliable performance in preventing messy overflows.
Pros
- Powerful backflow prevention
- Long term use
- No water stains
- Flush install
- Removable design
Cons
- Replacement part
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Engineered for longevity, it combines a solid brass core with a brushed nickel finish. This structure has excellent corrosion resistance and rust prevention while not leaving water stains, ensuring good durability over time.
The skirted design covers the entire air gap tubing and the curved top prevents water accumulation. After installation, it sits flush with the countertop for a clean look that matches your kitchen ideally.
Homeowners wanting a stylish upgrade for their air gap base will find this cap to be an easy win. The removable design simplifies routine maintenance and blockage clearing without requiring complex tools.
Stainless Surface
The smooth, stain-resistant surface allows easy cleaning and maintains a neat appearance even in humid conditions.
Secure Fit
Simply slip the cover onto the air gap base for a secure fit that will not shift or fall off during use.
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7. Dishwasher Air Gap Cover Black – Best Matte Finish
Dishwasher Air Gap Cover Black
Solid brass
Matte black
Skirted cap
Universal standard
This replacement cover is designed for those seeking a matte black finish to match modern kitchen aesthetics. With a 4.7 rating, it features solid brass construction that is resistant to corrosion and rust for years of reliable performance.
Pros
- Standard size
- Classic design
- Built to last
- Eight color options
- Easy to install
Cons
- Black finish only
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The skirted air gap cap with the matching escutcheon covers the entire air gap body for a clean look. It installs flush to the sink deck or countertop, complementing any home with classic and sensible styling.
As a universal standard size, it fits most of brands air gaps bodies without needing special adaptations. This makes it a convenient choice for replacing worn out caps on standard units.
Buyers looking for a durable and stylish replacement will find this unit to be a good value. With eight color options available in the line, you can easily find the perfect match for your sink and faucet.
Matte Finish
The matte black finish provides a sleek, modern look that hides fingerprints and water spots well.
Replacement Ready
Standard dimensions ensure it fits most existing air gap bodies for a straightforward replacement process.
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8. Prime-Line Dishwasher Air Gap – Best Simple Cover
Prime-Line Dishwasher Air Gap
Stamped steel
Chrome finish
Push on
Single pack
This cover is a straightforward accessory to vent air or water from your dishwasher. With a 4.5 rating, it is constructed from stamped steel with a chrome finish that adds a standard aesthetic touch.
Pros
- For use with air gaps
- Chrome finish
- Easy push on
- Fits most gaps
- One cover
Cons
- Basic design
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The easy push on installation makes it simple to fit over the air gap of your dishwasher without complicated steps. It is designed to fit over most air gaps for dishwashers, ensuring broad compatibility.
While it is a single pack, it serves well as a simple replacement for lost or damaged caps. The chrome plating helps it resist wear in a kitchen environment.
Homeowners needing a quick fix for a missing cover will find this to be an efficient solution. It is a practical choice that keeps the air gap functional and covered without extra complexity.
Ease of Use
The push on design means you can install or remove it easily without tools or adhesives.
Standard Fit
Its dimensions are designed to accommodate most standard air gap bodies found in residential installations.
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9. KRAUS Matte Black Air Gap – Best Modern Black
KRAUS Matte Black Air Gap
Solid brass cover
Matte black
9 inch height
Universal design
This unit prevents wastewater from backing up into your dishwasher, eliminating the risk of contaminating clean dishes. It has a 4.8 rating for its durability and elegant look that fits modern kitchen themes perfectly.
Pros
- Prevents wastewater backup
- High end look
- Rust resistant
- Universal design
- Clean install
Cons
- Specific hole size
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The kit includes a durable ABS plastic body and a solid brass cover for a lifetime of reliable performance. The premium corrosion resistant finish will not dull or fade over time, maintaining its Matte Black appearance.
Like its stainless steel counterpart, it has a specific pre drilled hole size requirement of 1 1/2 inches. The cap covers the entire air gap body and installs flush to the sink deck for a clean look.
Anyone wanting a sleek, contemporary plumbing accessory should consider this KRAUS model. It is compatible with all dishwashers on the market and comes with a 1 year warranty for added confidence.
Lifetime Performance
The solid brass cover offers superior durability and a high-end appearance that stands the test of time.
Clean Look
The cap installs flush to the sink deck or countertop, providing a seamless and polished aesthetic.
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10. Matte Black Air Gap Kit – Best Replacement Kit
Matte Black Air Gap Kit
High quality brass
Matte black
1 8 inch cap
Curved top
This kit is designed to prevent wastewater from backing up into your dishwasher, keeping your dishes clean. With a 4.7 rating, it offers a high quality brass cap and ABS plastic body for exceptional durability.
Pros
- Efficient prevention
- Stylish design
- Universal fit
- No tools needed
- Complete kit
Cons
- Replacement only
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The high-end matte black finish enhances the visual appeal of your kitchen while the curved top design prevents water vapor buildup. This reduces the risk of paint peeling and maintains a flawless appearance over time.
It features a universal fit with a 1.8 inch cap diameter that works with most kitchen sinks and dishwashers. The skirted cap and matching escutcheon cover the entire body and install flush for a clean look.
Ideal for homeowners looking to upgrade their air gap quickly, this kit requires no special tools for setup. Its classic design complements any home decor and provides an easy way to ensure hygiene and style.
Flawless Finish
The premium matte black finish resists corrosion and rust while adding a modern touch to your sink area.
Easy Setup
Setup is quick and easy without special tools, allowing you to install it securely with minimal effort.
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Buying Guide – How to Choose the Best Air Gap for Dishwasher
Choosing the right air gap involves balancing materials, finish, and compatibility with your existing sink.
Material Quality
Look for solid brass covers combined with durable ABS plastic bodies to ensure the unit can withstand frequent exposure to moisture and cleaning agents without corroding.
High quality materials like brass extend the life of the product and maintain their appearance over time.
Finish and Design
Select a finish that matches your faucet and sink to maintain a cohesive look in your kitchen. Options range from polished chrome to matte black and brushed nickel.
A design that covers the entire air gap body creates a cleaner look compared to models that leave parts of the body exposed.
Hole Size
Check the required pre-drilled hole size for your countertop or sink deck before buying. Most units require a standard 1 1/2 inch opening.
Ensure your sink or countertop can accommodate the required hole size to avoid additional drilling or fitting issues.
Backflow Prevention
The primary function of an air gap is to prevent wastewater from backing up into your dishwasher. Ensure the model you choose meets plumbing codes for effective prevention.
A reliable unit keeps your dishes safe from contamination and complies with local safety standards.
Installation Ease
Choose models that allow for easy push-on or slip-on installation to simplify the setup process. Some kits include escutcheons to cover the gap around the hole.
An easy installation saves time and reduces the need for professional plumbing services.
Dimensions
Consider the overall height and cap diameter to ensure the unit fits within your available space and matches your kitchen scale.
Proper dimensions ensure the air gap sits flush or aligns well with the sink deck for a neat appearance.
Warranty
Look for units that come with a warranty to protect against defects and ensure customer support is available if issues arise.
A warranty adds confidence to your purchase and reflects the manufacturer's commitment to quality.
Color Options
Many kits offer multiple color choices to match different kitchen styles. Verify if the specific color you want is available before ordering.
Having a choice helps you find a perfect match for your current kitchen decor and faucet style.
How to Use and Care for Your Air Gap for Dishwasher
Regularly check the air gap cap for any signs of loose fitting or damage. Ensure it sits securely on top of the air gap body to prevent accidental removal during use.
Clean the exterior with a soft cloth and mild detergent to avoid scratching the finish. Avoid harsh chemicals that might tarnish brass or degrade plastic components.
If you notice water leaking, inspect the internal components for blockages. Many models allow you to remove the cap to clear any debris that might be obstructing the flow.
Frequently Asked Questions
What is the purpose of a dishwasher air gap?
A dishwasher air gap prevents dirty wastewater from flowing back into your clean dishes by creating a physical barrier in the drain line. This ensures your dishes remain sanitary and meets many plumbing safety codes.
Is an air gap required by law?
In many states and regions, plumbing codes require an air gap for dishwasher installations to prevent backflow contamination. It is important to check your local regulations before installing your dishwasher.
Can I replace just the cap of an air gap?
Yes, if the body of your air gap is still functional, you can replace only the cap. Ensure the new cap matches the diameter and style of your existing unit for a proper fit.
How do I clean an air gap?
To clean an air gap, remove the cap and inspect for debris or clogs. Use a brush or water to clear any buildup inside the tubing and wipe down the exterior with a damp cloth.
What if my air gap is leaking?
If your air gap is leaking, check for blockages in the drain line or loose connections. Replacing the cap or tightening the fittings may resolve the issue depending on the severity.
Do air gaps fit all dishwashers?
Most standard air gaps are designed to fit all dishwasher models on the market. However, always check the diameter and connection sizes to ensure compatibility with your specific setup.
Final Thoughts on Choosing the Best Air Gap for Dishwasher
We have reviewed ten reliable options ranging from full kits to replacement caps to suit different needs. The KRAUS units offer premium quality while budget friendly options like Westbrass provide solid performance.
When choosing, prioritize material durability and a finish that matches your kitchen aesthetic. Ensuring the unit meets local plumbing codes is essential for safe and compliant installation.
Remember that prices and availability can change, so check current listings before finalizing your purchase. Selecting the right air gap will keep your kitchen safe and your dishes clean for years to come.