Westbrass Plastic Air Gap Polished Chrome
4.6Editor score
Standard plastic body design
Polished chrome finish option
Includes two pack for value
In this guide
An air gap for dishwasher is a crucial plumbing component that prevents wastewater from flowing back into your clean dishes. It ensures your kitchen remains hygienic and meets local plumbing code requirements effectively.
We compared ten top-rated models based on durability, design, and ease of installation. Our analysis covers solid brass caps, plastic bodies, and various finishes to help you find the perfect match for your sink.
Each pick highlights specific strengths like corrosion resistance or aesthetic appeal. Note that product availability and details may change over time, so verify specifications before purchasing to ensure compatibility with your existing setup.
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
Prevents wastewater backflow effectively
Stainless steel corrosion resistant finish
Dishwasher Air Gap Cover Solid Brass Brushed Nickel
4.7Editor score
High quality brass construction
Elegant brushed nickel finish
Skirted design covers tubing
Top 10 Best Air Gap for Dishwasher in 2026 Compared
This side-by-side comparison highlights key specifications and design features of the leading air gap models available today. Use this table to quickly identify the best fit for your kitchen sink and aesthetic preferences.
ProductsSpecificationsEditor scorePrice
Editor's Choice
KRAUS Dishwasher Air Gap Spot Free All-Brite
Material: ABS Plastic and Brass
Finish: Stainless Steel
Height: 9 inches overall
Warranty: 1 Year
4.8Editor score
Editor's Choice
2-Pack Dishwasher Air Gap Cover Water Ramp Silicone
Material: 100% Food Grade Silicone
Color: Grey or Black
Size: 5.12 x 2.1 inches
Function: Splash Guard and Ramp
4.3Editor score
Best Premium
Dishwasher Air Gap Cover Solid Brass Brushed Nickel
Material: Solid Brass Cap
Finish: Brushed Nickel
Cap Diameter: 1.8 inches
Design: Skirted with Escutcheon
4.7Editor score
Westbrass Plastic Air Gap Polished Chrome
Material: Plastic Body
Finish: Polished Chrome
Cap Diameter: 1.625 inches
Pack: 2 Count
4.6Editor score
Dishwasher Air Gap Kits Solid Brass Polished Chrome
Material: Solid Brass Cap
Finish: Polished Chrome
Includes: Flange and Body
Colors: Seven Options Available
4.6Editor score
Dishwasher Air Gap Cover Solid Brass Brushed Nickel
Material: Solid Brass Core
Finish: Brushed Nickel
Cap Diameter: 1.8 inches
Design: Skirted with Curved Top
4.8Editor score
Dishwasher Air Gap Cover Black Solid Brass
Material: Solid Brass Construction
Finish: Matte Black
Fit: Universal Standard Size
Colors: Eight Options Available
4.7Editor score
Prime-Line MP53045 Dishwasher Air Gap Cover
Material: Stamped Steel
Finish: Chrome Plated
Installation: Push On Design
Pack: Single Pack
4.5Editor score
KRAUS Dishwasher Air Gap Matte Black
Material: ABS Plastic and Brass
Finish: Matte Black
Height: 9 inches overall
Warranty: 1 Year
4.8Editor score
Dishwasher Air Gap Cover Solid Brass Matte Black
Material: Solid Brass Cap
Finish: Matte Black
Cap Diameter: 1.8 inches
Design: Skirted with Escutcheon
4.7Editor score
1. KRAUS Air Gap – Best Overall Choice for Durability and Style
KRAUS Dishwasher Air Gap in Spot Free All-Brite Stainless Steel
ABS Plastic Body with Brass Cover
Overall Height of 9 Inches
Pre-Drilled Hole 1.5 Inches
Corrosion Resistant Finish
This KRAUS air gap is a top-tier solution for homeowners seeking reliability and style. With a high rating and solid construction, it stands out for its ability to prevent contamination while looking great.
Pros
- Solid brass cover ensures longevity
- Prevents wastewater backflow effectively
- Premium stainless steel finish
- Includes 1 year warranty
- Universal design fits most models
Cons
- Requires specific hole size prep
- Higher price point than plastic
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The solid brass cover offers superior durability compared to all-plastic alternatives. It also features a premium corrosion-resistant finish that will not dull or fade over time, ensuring your kitchen maintains a clean appearance.
While it requires a specific pre-drilled hole size, the installation is straightforward with the included kit. The only minor trade-off is the cost, but the 1 year warranty and best-in-industry support justify the investment.
This model is perfect for those who want a high-end look without compromising on plumbing code compliance. If you value long-term performance and aesthetic appeal, this is the top recommendation for your sink.
Superior Durability with Brass
The solid brass cover provides a high-end appearance and resistance to corrosion that plastic cannot match.
Code Compliant Protection
It effectively prevents wastewater from backing up into your dishwasher, eliminating contamination risks.
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2. Silicone Splash Guard – Best Accessory for Preventing Messes
2-Pack Dishwasher Air Gap Cover Water Ramp Silicone Splash Guard
Made of 100% Food Grade Silicone
Fits Most Air Gap Cover Diameters
5.12 by 2.1 Inch Size
Grey or Black Color Options
This silicone splash guard is an excellent accessory for managing water overflow around your existing air gap. It is designed to catch drips and direct them into the sink, keeping your countertops dry and clean.
Pros
- Catches drips and direct water
- Made from safe food-grade silicone
- Easy to clean and durable
- Includes two colors in one pack
- Simple to install quickly
Cons
- Accessory only not a full gap
- May not fit all sizes perfectly
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Made from 100% food-grade silicone, it is safe and odorless while being more durable than other materials. The 4-degree slope helps water drain better, reducing the need to wipe down your counter-tops frequently.
While it is not a replacement for the air gap itself, it complements existing setups perfectly. The main limitation is fitment, as you should verify the hole size before purchasing to ensure a snug fit.
Buy this if you want to keep your kitchen tidy and add a touch of elegance to your décor. It is a practical, affordable addition that enhances the overall aesthetic and functionality of your sink area.
Keeps Countertops Dry
The ramp design catches water from the air gap cover and directs it into the sink efficiently.
Stylish and Safe Material
Food-grade silicone ensures safety and durability while blending seamlessly with home décor.
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3. Brushed Nickel Brass Cap – Premium Look with Curved Top
Dishwasher Air Gap Cover Solid Brass Brushed Nickel
High Quality Brass Cap Construction
Curved Top Design Prevents Buildup
Skirted Cap with Escutcheon
Fits Most Sinks and Dishwashers
This replacement kit offers a premium upgrade for your existing air gap body. It features a solid brass cap with a high-end brushed nickel finish that enhances the visual appeal of any kitchen sink.
Pros
- Elegant brushed nickel finish
- Curved top reduces vapor buildup
- Solid brass for durability
- Includes matching escutcheon
- Easy installation no tools
Cons
- Replacement kit only not full gap
- Brass may tarnish without care
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The curved top design is a standout feature that prevents water vapor buildup, reducing the risk of paint peeling. The skirted cap covers the entire air gap body, installing flush for a clean, sophisticated appearance.
Installation is hassle-free and requires no special tools, making it accessible for DIY homeowners. The main consideration is that this is a cap kit, so you must ensure your existing body is compatible.
This is ideal for homeowners looking to refresh their kitchen look without replacing plumbing pipes. If you value elegant design and corrosion resistance, this brush nickel option delivers exceptional value and style.
Curved Top for Longevity
The design prevents water vapor buildup which helps maintain a flawless appearance over time.
Complete Aesthetic Upgrade
Matching escutcheon and skirted design cover the entire body for a seamless, clean look.
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4. Westbrass 2-Pack – Best Value for Basic Functionality
Westbrass Plastic Air Gap Polished Chrome
Standard Plastic Body Included
Overall Height of 9 Inches
1.625 Inch Cap Diameter
Polished Chrome Finish Cap
This two-pack from Westbrass provides a reliable and budget-friendly solution for basic dishwasher air gap needs. It offers standard functionality with a polished chrome finish that suits many modern kitchens.
Pros
- Includes two units in one pack
- Standard design fits most installs
- Affordable price point
- Reliable backflow prevention
- Polished chrome finish
Cons
- Plastic body less durable
- Cap leaves lip exposed
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The overall height is 9 inches with a plastic body, which is standard for most residential installations. The cap diameter is 1.625 inches, ensuring compatibility with a wide range of sink holes and plumbing setups.
While the plastic body is less durable than brass, it performs its job effectively at a great price. The main trade-off is that the cap leaves the lip of the air gap body exposed when installed.
This is a smart choice for renters or homeowners on a budget who need code compliance without extra costs. If you prioritize function over premium aesthetics, this two-pack offers excellent value and reliability.
Value of Two Pack
Getting two units ensures you have a spare for future replacements or multiple sinks.
Standard Fitment
Standard dimensions make it easy to install without custom plumbing modifications.
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5. Polished Chrome Kit – Versatile Color Options for Customization
Dishwasher Air Gap Kits Solid Brass Polished Chrome
Solid Brass Construction Cap
Includes Matching Escutcheon
Seven Color Options Available
Universal Air Cap Kit
This kit provides a solid brass cap with a flange and body, making it a comprehensive solution for replacements. It is designed to fit most dishwashers and prevent wastewater from backing up effectively.
Pros
- Solid brass for maximum durability
- Multiple color options available
- Matches kitchen sink and faucet
- Flange and body included
- Hassle-free installation design
Cons
- Price varies by finish
- Requires checking hole size
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One of its best features is the selection of seven color options, allowing you to match your kitchen faucet or sink perfectly. The polished chrome finish is classic and complements any home style with ease.
The installation is straightforward and designed to be hassle-free for most users. However, you should verify the hole size before purchasing to ensure the unit fits flush to the sink deck or countertop.
Choose this if you want a balance of durability and aesthetic flexibility for your kitchen setup. The classic design and solid construction make it a strong contender for those seeking a tailored look.
Match Your Kitchen Style
Choose from seven color options to perfectly match your kitchen sink and faucet.
Built to Last
Solid brass construction resists corrosion and rust for a longer service life.
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6. Solid Brass Skirted Cap – Reliable Corrosion Protection
Dishwasher Air Gap Cover Solid Brass Brushed Nickel
Solid Brass Core Construction
Skirted Design Covers Tubing
Brushed Nickel Finish
1.8 Inch Cap Diameter
This solid brass cap is engineered for longevity and effective backflow prevention. It combines a brass core with a brushed nickel finish to ensure excellent corrosion resistance and rust prevention.
Pros
- Solid brass prevents rust
- Curved top avoids water stains
- Skirted design covers tubing
- Universal size for compatibility
- Stain resistant surface
Cons
- Replacement only not full gap
- Check existing hole height
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The skirted design covers the entire air gap tubing, creating a clean look that matches your kitchen ideally. The curved top prevents water accumulation to avoid paint peeling, ensuring a flawless appearance over time.
Installation is effortless as you simply slip the cover onto the base for a secure fit. You should check the height of your existing ventilation holes before purchasing to ensure a proper fit.
This is a great choice for maintaining a clean and dry kitchen environment with minimal maintenance. Its durability and aesthetic appeal make it an excellent upgrade for existing air gap bodies.
Corrosion Resistance
Solid brass core ensures long-term use without rust or water stains.
Clean Skirted Design
Covers the entire air gap body for a flush, seamless appearance on the deck.
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7. Matte Black Brass Cap – Best for Modern Dark Finishes
Dishwasher Air Gap Cover Black Solid Brass
Solid Brass Construction
Matte Black Finish
Universal Standard Size
Eight Color Options Available
This matte black cap is designed for homeowners who want to match modern, dark fixtures in their kitchen. It features a solid brass construction that ensures maximum durability and resistance to corrosion.
Pros
- Matte black modern finish
- Solid brass for durability
- Resistant to corrosion and rust
- Skirted cap covers tubing
- Fits most brand air gaps
Cons
- Cap only not full kit
- Black may show scratches
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The skirted cap covers the entire air gap body and installs flush to the sink deck or countertop for a clean look. It is a replacement only, so check your existing body before purchasing to ensure compatibility.
With eight color options available, it offers flexibility to match your specific sink and faucet. The classic styling complements any home while providing the reliable performance needed for plumbing safety.
This is the best option if you want a sophisticated, dark finish that stands out. It offers great value for money with a longer service life thanks to its solid brass build.
Modern Matte Finish
Matte black finish provides a modern aesthetic that pairs well with dark kitchen fixtures.
Solid Construction
Built from solid brass to ensure longevity and resistance to rust.
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8. Prime-Line Steel Cover – Simple Push-On Solution
Prime-Line MP53045 Dishwasher Air Gap Cover
Constructed from Stamped Steel
Chrome Plated Finish
Easy Push On Installation
Fits Most Air Gaps
This cover is designed for use with dishwasher air gaps to vent air or water from your dishwasher. It features a chrome plated finish and is constructed from stamped steel for basic durability.
Pros
- Simple push on design
- Chrome plated finish
- Made of stamped steel
- Affordable single pack option
- Quick to install
Cons
- May not fit all brands
- Steel can rust if worn
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Installation is very simple as it is designed to be pushed on over the air gap of your dishwasher. It is intended to fit over most air gaps, making it a versatile option for standard setups.
While it is affordable and functional, steel may show wear faster than brass over time. The package contains one cover, so ensure you do not need a spare for future maintenance.
This is a good choice if you need a quick, inexpensive fix for an existing air gap body. It works well for standard installations where a basic cap is sufficient for ventilation.
Easy Installation
The push-on design allows for quick and easy installation without tools.
Ventilation Function
Helps vent air and water properly to prevent drainage issues.
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9. KRAUS Matte Black – Top Quality Black Finish
KRAUS Dishwasher Air Gap Matte Black
Solid Brass Cover
Matte Black Finish
Overall Height 9 Inches
Corrosion Resistant Finish
This KRAUS model brings the same quality as their stainless version but in a matte black finish. It includes a solid brass cover and durable ABS plastic body for a lifetime of reliable performance.
Pros
- Solid brass cover durability
- Premium matte black finish
- 1 year warranty included
- Compatible with all dishwashers
- Prevents wastewater backup
Cons
- Requires specific hole size
- Higher cost than basic models
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The premium corrosion-resistant finish will not dull or fade over time, making it ideal for modern kitchens. It is designed to prevent wastewater from backing up into your dishwasher, protecting your clean dishes.
You will need a 1.5-inch pre-drilled hole for installation, so verify your sink deck before buying. The cap covers the entire body and installs flush for a sleek, high-end appearance that stands out.
This is perfect for homeowners who want a durable, stylish black air gap that lasts. The combination of solid brass and corrosion resistance ensures long-term value and peace of mind.
Premium Finish Quality
The matte black finish will not dull or fade over time, maintaining a clean look.
Complete Protection
Prevents wastewater from backing up and eliminates the risk of contaminating dishes.
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10. Matte Black Brass Kit – High-End Black Replacement
Dishwasher Air Gap Cover Solid Brass Matte Black
Solid Brass Cap
High-End Matte Black Finish
Curved Top Design
Includes Escutcheon
This replacement kit offers a high-end matte black finish that enhances the visual appeal of your kitchen. It features a solid brass cap with a curved top design that prevents water vapor buildup.
Pros
- Solid brass cap quality
- High-end matte black finish
- Includes matching escutcheon
- Universal fit perfect size
- Hassle-free installation
Cons
- Replacement kit only
- Check pipe diameters
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The air gap cap has a diameter of 1.8 inches with matching escutcheon to cover the entire body. This ensures a clean appearance and reduces the risk of paint peeling on the surface over time.
Installation is hassle-free and requires no special tools, allowing for quick setup on your sink deck. However, you should verify the existing pipe diameters to ensure the new cap fits securely.
This is an excellent choice for updating your kitchen with a stylish, durable black finish. The classic and sensible design complements any home decor while providing reliable backflow prevention.
Curved Top Design
Prevents water vapor buildup and reduces the risk of paint peeling over time.
Complete Replacement Kit
Includes matching escutcheon for a seamless, clean appearance on the sink deck.
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Buying Guide – How to Choose the Best Air Gap for Dishwasher
Selecting the right air gap involves considering materials, finishes, and installation requirements. This guide breaks down key factors to help you make an informed decision.
Material Quality
The most durable options feature a solid brass cap or full body construction. Brass resists corrosion and rust better than plastic or steel, ensuring a longer service life.
For budget-friendly options, plastic bodies are acceptable but may not last as long in humid kitchen environments.
Finish and Aesthetics
Choose a finish that matches your kitchen faucet and sink, such as polished chrome, brushed nickel, or matte black. Many brands offer multiple color options to fit your style.
Ensure the finish is corrosion-resistant to maintain its look over time without dulling or fading.
Fit and Dimensions
Check the required hole size on your countertop or sink deck before buying. Most units require a standard 1.5-inch hole, but some may vary slightly.
Measure your existing air gap pipes if you are replacing just the cap to ensure compatibility.
Skirted vs Standard Design
Skirted caps cover the entire body and install flush to the deck for a cleaner look. Standard designs may leave the body exposed which can be less aesthetically pleasing.
A skirted design is often preferred for modern kitchens where a seamless appearance is desired.
Installation Requirements
Look for products that offer easy installation without special tools. Push-on designs or simple screw-on mechanisms can save time and effort.
Ensure the product comes with all necessary components like escutcheons or mounting flanges for a complete setup.
Code Compliance
In many states, air gaps are required by plumbing codes for dishwasher installations. Verify local regulations to avoid issues with home inspections or insurance.
Choose a product that explicitly states compliance with relevant plumbing standards to ensure safety.
Warranty and Support
Reputable brands often provide warranties ranging from one year to lifetime. A warranty protects your investment against defects or manufacturing issues.
Check customer support availability to resolve any installation or compatibility questions quickly.
Additional Accessories
Consider buying splash guards or ramps if you experience water overflow. These accessories keep your countertops dry and add to the overall functionality.
Some kits may include extra parts that simplify the installation process or extend the lifespan.
How to Use and Care for Your Air Gap for Dishwasher
To maintain your air gap, remove the cap occasionally and rinse it under running water to clear any debris that might cause clogs. This simple step ensures optimal drainage and prevents backups.
Avoid using harsh chemicals that could damage the finish or seals. Warm soapy water is sufficient to clean the exterior and keep the unit looking pristine in your kitchen.
If you notice water leaking or pooling around the base, check for loose connections or blockages in the hoses. Addressing these issues promptly can prevent water damage and ensure continued proper function.
Frequently Asked Questions
What exactly does a dishwasher air gap do?
An air gap prevents wastewater from flowing back into your dishwasher and contaminating clean dishes. It is a plumbing device that creates a physical break in the drain line to ensure proper drainage.
Is an air gap legally required for dishwashers?
In many states and municipalities, plumbing codes require an air gap for dishwasher installations. Always check your local regulations to ensure compliance before proceeding with your setup.
What is the standard size for an air gap hole?
Most standard air gaps require a 1.5-inch hole in your sink deck or countertop. Verify the specific product requirements before drilling to ensure a proper fit.
How do I clean my dishwasher air gap?
Remove the cap and rinse it under running water to remove debris. Use warm soapy water to wipe the exterior and avoid harsh chemicals that might damage the finish.
Can I replace just the cap of my air gap?
Yes, many products are sold as replacement kits that include a new cap and escutcheon. Ensure your existing body is compatible with the new cap size before purchasing.
What materials are best for an air gap?
Solid brass caps offer the best durability and resistance to corrosion compared to plastic. Choosing a high-quality material ensures a longer service life and better protection against rust.
Why is my air gap leaking water?
Leaks often occur due to a clog in the drain hose or improper installation. Check for blockages and ensure all connections are tight to resolve the issue.
Can I hide the air gap if it is ugly?
You can use a matching escutcheon or splash guard to cover the exposed parts. Many designs install flush to the countertop for a sleek and hidden appearance.
Final Thoughts on Choosing the Best Air Gap for Dishwasher
Our top picks include the KRAUS models for their premium brass quality and the Westbrass 2-pack for budget-friendly reliability. Each option offers unique benefits depending on your kitchen style and needs.
When selecting a model, prioritize durability with brass construction and a finish that matches your kitchen decor. Ensure you verify compatibility with your sink hole size before purchasing.
Remember to check current availability and specifications as they may change over time. This guide helps you make an informed choice for a compliant and effective kitchen setup.