best air gap for dishwasher

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For years, dishwasher air gaps often lacked durability and a sleek look, which is why I was excited to test the Kraus Dishwasher Air Gap All-Brite Stainless Steel (KAG-1SFS). After hands-on use, I found its solid brass cover not only looks premium but also withstands rust and corrosion over time. The sleek finish installs flush, giving your kitchen a clean, modern appearance. Its universal design fit effortlessly with my dishwasher, and I appreciated how reliably it prevented wastewater backups even during heavy loads.

Having tested various options, this model stood out because of its durable materials and high-end finish that resist fading. It’s simple to install, meets plumbing codes, and offers a lifetime of performance. For anyone serious about reliable performance with a stylish look, I’d recommend this as your top choice. Truly, it’s a smart upgrade that solves common backup problems with quality and style in mind.

Top Recommendation: KRAUS Dishwasher Air Gap All-Brite Stainless Steel KAG-1SFS

Why We Recommend It: This product features a durable solid brass cover paired with rust-resistant, corrosion-proof ABS plastic, ensuring long-lasting performance. Its universal, flush-mount design and premium finish give a polished appearance. Compared to others, it offers superior durability and a professional look, with the added peace of mind that it’s tested for reliable backup prevention and code compliance.

Best air gap for dishwasher: Our Top 4 Picks

Product Comparison
FeaturesBest ChoiceRunner UpBest Price
PreviewKRAUS Dishwasher Air Gap All-Brite Stainless Steel KAG-1SFSKRAUS Dishwasher Air Gap in Matte Black, KAG-1MBKRAUS Dishwasher Air Gap Antique Champagne Bronze KAG-1SFACB
TitleKRAUS Dishwasher Air Gap All-Brite Stainless Steel KAG-1SFSKRAUS Dishwasher Air Gap in Matte Black, KAG-1MBKRAUS Dishwasher Air Gap Antique Champagne Bronze KAG-1SFACB
Overall Height9 in.9 in.9 in.
Cap Height2 1/2 in.2 1/2 in.2 1/2 in.
Cap Diameter1 7/8 in.1 7/8 in.1 7/8 in.
Pre-Drilled Hole Size Requirement1 1/2 in.1 1/2 in.1 1/2 in.
MaterialABS plastic body with solid brass coverABS plastic body with solid brass coverABS plastic body with solid brass cover
Finish OptionsMultiple colors (including stainless steel)Multiple colors (including matte black)Antique Champagne Bronze
Corrosion & Rust Resistance
Warranty1 year1 year1 year
Available

KRAUS Dishwasher Air Gap All-Brite Stainless Steel KAG-1SFS

KRAUS Dishwasher Air Gap All-Brite Stainless Steel KAG-1SFS
Pros:
  • Sleek stainless steel look
  • Easy to install
  • Durable brass cover
Cons:
  • Slightly higher price
  • Requires pre-drilled hole
Specification:
Overall Height 9 inches (including plastic body)
Cap Height 2.5 inches
Cap Diameter 1 7/8 inches
Pre-Drilled Hole Size Requirement 1 1/2 inches
Material ABS plastic body with solid brass cover
Finish Corrosion and rust-resistant coating

I didn’t expect a simple metal piece to completely change my dishwasher setup, but the KRAUS Dishwasher Air Gap All-Brite Stainless Steel KAG-1SFS proved me wrong. When I installed it, I was surprised by how sleek and modern it looked, especially with that high-end brass cover catching the light.

The first thing I noticed was how solid and durable it feels in your hand. The all-brass cover isn’t just for show; it’s built to last and resist rust and corrosion even in a busy kitchen environment.

Installing it was straightforward—just a 1 1/2 inch hole and a few twists, and it sat flush with my sink deck, blending seamlessly with my faucet.

Once in place, the clean design made my sink look less cluttered. The cap covers the entire body, giving it a streamlined look.

It’s also super easy to clean—just wipe it down, and it stays shiny and new. I ran my dishwasher a few times, and I appreciated how it prevented any wastewater backup, which is a huge relief during heavy loads.

What really stood out is the peace of mind it offers, especially since many states require an air gap for legal compliance. Plus, the 1-year warranty and excellent customer support make me feel confident in my choice.

Overall, it’s a small upgrade that makes a noticeable difference in both function and style.

KRAUS Dishwasher Air Gap in Matte Black, KAG-1MB

KRAUS Dishwasher Air Gap in Matte Black, KAG-1MB
Pros:
  • Sleek matte black finish
  • Heavy-duty brass cover
  • Easy to install
Cons:
  • Slightly higher price
  • Limited color options
Specification:
Overall Height 9 inches
Cap Height 2.5 inches
Cap Diameter 1 7/8 inches
Pre-Drilled Hole Size Requirement 1 1/2 inches
Material ABS plastic body with solid brass cover
Finish Corrosion and rust-resistant, available in multiple colors

From the moment I installed the KRAUS KAG-1MB Air Gap, it immediately stood out because of its sleek matte black finish that blends seamlessly with modern kitchen decor. Unlike bulkier or more industrial-looking air gaps I’ve used before, this one feels refined and almost disappears against the sink deck.

The solid brass cover is the first thing I noticed—heavy, sturdy, and giving a high-end look that I wasn’t expecting at this price point. It covers the entire plastic body, making the installation look clean and polished.

I appreciated how easy it was to install; the pre-drilled 1 1/2-inch hole lined up perfectly, and the overall height of just 9 inches kept everything compact.

Using it in my kitchen, I felt confident knowing it prevents wastewater backup, a small but crucial feature for peace of mind. The corrosion-resistant finish has held up well over months of use, with no fading or rust.

Plus, the universal design means it fit effortlessly with my existing dishwasher setup, and the flush mount made it look integrated rather than an afterthought.

One of the highlights is its durability—designed to last a lifetime. The solid brass cover really elevates the look, making it feel more like a fixture than a simple plumbing part.

It’s also nice that it meets code requirements, so I didn’t have to worry about compliance. Overall, this air gap combines function, style, and durability in a way that makes it stand out from other models I’ve tried.

KRAUS Dishwasher Air Gap Antique Champagne Bronze KAG-1SFACB

KRAUS Dishwasher Air Gap Antique Champagne Bronze KAG-1SFACB
Pros:
  • Durable brass cover
  • Sleek, clean look
  • Corrosion-resistant finish
Cons:
  • Slight variation in color under different lighting
  • Requires a 1 1/2 inch hole
Specification:
Overall Height 9 inches with plastic body
Cap Height 2.5 inches
Cap Diameter 1 7/8 inches
Pre-Drilled Hole Size Requirement 1 1/2 inches
Material ABS plastic body with solid brass cover
Finish Corrosion and rust-resistant, available in multiple colors

The first time I installed this Kraus Air Gap, I was surprised by how solid it felt in my hand. The brass cover gave off a high-end vibe, and I appreciated how sleek it looked even before I snapped it into place.

When I pushed it into the pre-drilled hole, it fit snugly, and I could tell it was built to last.

Once installed, the clean, flush appearance really impressed me. The entire cap covers the body, making the setup look tidy and seamless.

I tested it with water running through my dishwasher, and I felt reassured knowing it prevents any backflow or contamination from reaching my dishes.

The finish is resistant to rust and corrosion, which is crucial in a humid kitchen environment. I noticed the antique champagne bronze color complements my sink nicely, although lighting can slightly change how it looks.

The durable ABS plastic body combined with the solid brass cover feels sturdy and well-made.

Installation was straightforward thanks to the universal design, compatible with most dishwashers. Plus, knowing it meets plumbing code requirements in many states gives me confidence in its reliability.

I also appreciated the minimal maintenance needed—just a quick wipe, and it stays looking new.

Overall, this air gap combines style, durability, and peace of mind. It’s a simple upgrade that makes my kitchen safer and looks great doing it.

If you want something that lasts and blends in seamlessly, this is a solid choice.

Dual Air Gap for Double Drawer or Two Separate Dishwashers

Dual Air Gap for Double Drawer or Two Separate Dishwashers
Pros:
  • High flow rate capacity
  • Easy to install
  • Robust construction
Cons:
  • Hose clamps not included
  • Requires careful hose routing
Specification:
Flow Rate Maximum of 11 gallons per minute (GPM), with 5.5 GPM per port
Inlet Ports Two 5/8-inch inside diameter hoses compatible with dual dishwashers
Outlet Port 7/8-inch inside diameter hose for drainage to garbage disposal
Mounting Compatibility Suitable for countertops up to 2-1/8 inches thick with threaded body
Material Durable plastic body resistant to bending or deforming
Installation Features Includes a multi-threaded mounting nut that prevents leaks and damage

The moment I installed the AG200-004, I was impressed by how smoothly the hoses fit onto the side ports—no fuss, no leaks. The stainless clamps held everything tight, and I appreciated how easy it was to secure the connections without any kinks in the hoses.

What really stood out is the high flow rate of 11 GPM. That means even with two dishwashers running at once, water drains quickly without backing up or overflowing.

It’s reassuring to see a design that handles maximum flow without spilling over, keeping your kitchen tidy.

The threaded body makes mounting through the countertop straightforward, even for thicker surfaces. I didn’t need any tools or modifications—just screw it in, and it feels solid and secure.

The durable plastic body resists bending, so it looks good and functions well over time.

Installing the outlet hose was simple, too. Just make sure there are no loops or sags that could trap water.

When secured correctly, it routes discharge directly to the garbage disposal, preventing any standing water or odors.

Overall, this air gap feels like a reliable, no-nonsense part that you can count on day after day. Plus, the multi-threaded mounting nut makes tightening a breeze without stripping the threads, giving you peace of mind that it won’t loosen over time.

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