5 Best Dishwasher Air Gap Kits (November 2026)
The best dishwasher air gap kits include the Design House 522953 Dishwasher Air Gap Kit for common replacement connections, the PetrelWing Dishwasher Air Gap Kits with Stainless for a stainless sink deck, and the Westbrass A200-1-62 1-3/4" x 2-3/4" Solid Brass for matte black fixtures.
On this page (5 sections)
The best dishwasher air gap kit for most replacements is the Design House 522953, with 5/8 in and 7/8 in inlets, an ABS body and a satin nickel solid brass cover. PetrelWing offers a stainless-finish alternative, while the AIR GAP INTERNATIONAL dual model adds a connection for a reverse osmosis filter.
An air gap is a plumbing component that separates dishwasher discharge from the drain connection. Match the inlet, outlet and mounting style to your existing setup before selecting a finish.
If you're installing a countertop model, first learn what an air gap is on a countertop dishwasher. For hose sizing and replacement options, see our best dishwasher air gap drain hose guide.
Our picks at a glance
-
1
Best for common replacement connectionsDesign House 522953 Dishwasher Air Gap Kit
9.7/10 our score
See it on Amazon -
2
Best for a stainless sink deckPetrelWing Dishwasher Air Gap Kits with Stainless
9.6/10 our score
See it on Amazon -
3
Best for matte black fixturesWestbrass A200-1-62 1-3/4" x 2-3/4" Solid Brass
9.4/10 our score
See it on Amazon
- 4
Check itDual Air Gap for Dishwasher and Reverse
Best for dishwasher and RO drainage - 5
Check itWOWOW Kitchen Faucet with Air Gap
Best for a faucet and air gap bundle
Which dishwasher air gap kit is best for your setup?
The Design House kit is the strongest general replacement pick here, while the other choices address finish matching, dual drainage or a faucet upgrade. Confirm connection sizes and mounting clearance before choosing among them.
Design House 522953 Dishwasher Air Gap Kit: Best for common replacement connections
- 5/8 in and 7/8 in inlets
- ABS plastic body
- Satin nickel solid brass cap
- Skirted base
The two inlet sizes and skirted base make this a practical replacement choice when they match your existing setup. The kit does not include hose connections.
Pros
- Two inlet sizes
- Skirted base mounts flush to sink deck or countertop
- 5-year limited warranty
Cons
- Hose connections are not included
- Finish choice here is satin nickel
The Design House 522953 is the best fit when your existing connections use 5/8 in and 7/8 in inlets. Its ABS body and skirted base suit a replacement mounted at the sink deck or countertop.
The solid brass cap has a satin nickel finish, which can coordinate with common stainless and nickel fixtures. The cap is described as corrosion resistant, and Design House includes a 5-year limited warranty.
This kit does not include hose connections, so plan to reuse compatible hoses or source them separately. Check the route from dishwasher to air gap and then to the disposal or drain before removing the old assembly.
If the hose needs more reach, compare dishwasher hose extension kits against the connection sizes.
Pick it for a straightforward replacement where the inlet sizes match. If you need different styling, compare PetrelWing's stainless finish or Westbrass's matte black cap.
PetrelWing Dishwasher Air Gap Kits with Stainless: Best for a stainless sink deck
- ABS plastic body
- Solid brass cap
- Stainless finish
- Matching escutcheon
The matching escutcheon and skirted cap suit a replacement where a stainless look matters. The cap and body are included.
Pros
- Matching escutcheon
- Cap covers the air gap body
- Multiple color options
Cons
- Confirm fit with your existing hoses
- No inlet diameters specified
PetrelWing is the best choice here for a stainless look with a matching escutcheon. The skirted solid brass cap and plastic body are included, and the cap is designed to cover the air gap body.
The brand describes the cap as corrosion and rust resistant. Its surface-mounted design is intended to sit flush to a sink deck or countertop, giving the replacement a coordinated appearance around the opening.
The product details do not specify inlet diameters, so confirm that the body works with your dishwasher hose and outlet route before ordering. A finish match alone does not tell you whether the plumbing connections fit.
Choose it when appearance and the included escutcheon matter. For a deeper look at color options, read our best dishwasher air gap matte black guide.
Westbrass A200-1-62 1-3/4" x 2-3/4" Solid Brass: Best for matte black fixtures
- Matte black finish
- Solid brass cap
- Plastic body
- Skirted design
The matte black cap can coordinate with dark fixtures, and the kit includes a flange and plastic body. Check that the listed dimensions suit the sink deck and available clearance.
Pros
- Matte black finish
- Flange and plastic body included
- Skirted cap covers the air gap body
Cons
- Confirm hose and connection compatibility
- 1-year limited warranty
The Westbrass A200-1-62 is the best dishwasher air gap kit for a matte black sink deck. Its cap measures 1-3/4 in across and 2-3/4 in high, with an overall height of 9-1/8 in including the plastic body.
The kit includes a flange and plastic body, and the skirted cap covers the air gap body. Measure the sink opening and available height so the assembly fits the location without crowding nearby fixtures or cabinetry.
Westbrass describes this air gap as a way to shield dishwasher water from overflowing into the main water lines. Its stated limited warranty is 1 year.
Pick this model when the finish and dimensions fit your installation. For hose planning, use our dishwasher air gap drain hose guide.
Dual Air Gap for Dishwasher and Reverse: Best for dishwasher and RO drainage
- Dishwasher and RO inlet ports
- 5/8 in dishwasher hose inlet
- 1/4 in RO tubing port
- 7/8 in drain hose connection
Two inlet ports connect a dishwasher and a reverse osmosis filter to drainage through one air gap. It uses a threaded body for countertop mounting.
Pros
- Separate dishwasher and RO inlet ports
- Threaded body for countertop mounting
- Maximum dishwasher flow rate of 11 GPM
Cons
- Not compatible with reverse osmosis faucets with air gap
- Hose clamps are not included
The AIR GAP INTERNATIONAL model is the best choice when one assembly needs to serve a dishwasher and an RO filter. Its ports accept a 5/8 in inside diameter dishwasher hose and 1/4 in outside diameter RO tubing.
The drain side connects to a 7/8 in inside diameter hose that routes to the disposal's side drain connection. The maker specifies a maximum flow rate of 11 GPM for the dishwasher port and 1 GPM for the RO port.
Its threaded body mounts through a countertop up to 1-3/4 to 2-1/8 in thick. Keep the outlet hose free of kinks, sagging and loops, and note that hose clamps are not included.
This model is not compatible with reverse osmosis faucets that already have an air gap. If you want to understand when separate ports help, read when to choose a double dishwasher air gap.
WOWOW Kitchen Faucet with Air Gap: Best for a faucet and air gap bundle
- Kitchen faucet and air gap kit
- Brushed nickel finish
- Pull-down sprayer with 3 modes
- Deck plate and adapters included
The package combines a pull-down kitchen faucet with an air gap kit, which can suit a broader sink upgrade. Check the sink holes and faucet connections before choosing the set.
Pros
- Faucet and air gap kit in one package
- Three sprayer modes
- Deck plate and adapters included
Cons
- A bundle may be unnecessary for an air gap replacement alone
- Confirm sink hole layout
The WOWOW bundle is the best option when replacing the faucet and air gap together. It pairs a brushed nickel pull-down kitchen faucet with an air gap kit, deck plate and adapters.
The sprayer has stream, spray and dual-sweep modes, and the faucet pulls out up to 18 in. The package is designed for a deck mount, but check your sink's hole layout and available deck space before choosing a bundled faucet.
For a single air gap repair, the faucet may add parts you do not need. If your goal is only drainage, compare the standalone kits above and verify hose compatibility.
Choose WOWOW when a faucet refresh is part of the same project. For a countertop dishwasher that drains into a sink, see whether a countertop dishwasher can drain into a sink.
What should you check before buying an air gap device?
Check hose diameters, outlet routing, sink opening and mounting clearance before buying an air gap device for a dishwasher. These measurements determine whether the body and cover will work with your plumbing.
Start with the dishwasher hose connection, then identify where the air gap outlet goes. For portable models, compare replacement dishwasher hose options.
The Design House kit specifies two inlet sizes, while the dual AIR GAP INTERNATIONAL model gives separate dishwasher, RO and drain connection sizes.
A replacement cover can look right but still fail to match the body below the sink. If only the cover is damaged, confirm whether your existing air gap body accepts the replacement assembly.
Also measure the countertop thickness and clearance below it. The dual model gives a threaded-body mounting range, while several other picks focus on a cap, flange and plastic body without a stated countertop thickness range.
For hose length and routing, use the guide to how long a countertop dishwasher drain hose is. If you are planning a full appliance install, the best 18 inch dishwasher mounting bracket guide covers a separate mounting need.
Is a double dishwasher air gap right for you?
A double-port air gap is useful when you need to route a dishwasher and a reverse osmosis filter through the same assembly. For a dishwasher-only setup, a standard air gap kit is usually the simpler match.
The AIR GAP INTERNATIONAL model has one dishwasher inlet and one RO tubing port, so it is a dual-purpose unit rather than two dishwasher connections. Confirm your RO system and faucet arrangement before buying because this model is not compatible with reverse osmosis faucets with an air gap.
The double dishwasher air gap guide explains how to distinguish dual-purpose configurations and what to check in the hose path. If the appliance itself needs parts, browse best Bosch dishwasher replacement parts.
How do you choose the best dishwasher air gap kit?
Choose the kit by connection fit first, then finish and included parts. A cap that matches your faucet is useful only when the body, hoses and mounting location also work.
For common 5/8 in and 7/8 in connections, start with Design House. For a stainless appearance, consider PetrelWing after checking the hose fit, and choose Westbrass when the matte black finish and stated dimensions suit the sink.
If an RO filter also drains through the assembly, the dual AIR GAP INTERNATIONAL unit has dedicated ports for both. If you are changing the faucet at the same time, the WOWOW bundle combines a faucet and air gap kit.
Which dishwasher air gap kit should you choose?
Choose Design House for a replacement with matching 5/8 in and 7/8 in inlets, PetrelWing for a stainless finish, and Westbrass for matte black. Pick the AIR GAP INTERNATIONAL dual model for dishwasher and RO drainage, or WOWOW when you also want a faucet package.
Before buying, measure the hoses, sink opening and countertop thickness, then check where the dishwasher air gap drain hose will connect. The right kit is the one that matches those details and the look you want.
Our top 3 picks at a glance
-
1
Best for common replacement connections
Design House 522953 Dishwasher Air Gap Kit
9.7/10 our score
See it on Amazon -
2
Best for a stainless sink deck
PetrelWing Dishwasher Air Gap Kits with Stainless
9.6/10 our score
See it on Amazon -
3
Best for matte black fixtures
Westbrass A200-1-62 1-3/4" x 2-3/4" Solid Brass
9.4/10 our score
See it on Amazon
Frequently asked questions
What is the best dishwasher air gap kit for a replacement?
The Design House 522953 is a strong starting point when your setup uses 5/8 in and 7/8 in inlets. It has an ABS body, a satin nickel solid brass cap and a skirted base.
Check your hose sizes and sink opening before ordering, since a similar-looking cap does not confirm a match.
Does a dishwasher air gap kit include hoses?
Some kits focus on the air gap body, cap and flange, while hose connections may be separate. The Design House kit does not include hose connections.
Measure the hose ends and check the disposal or drain connection so you can get the right parts for the full route.
Can one air gap connect a dishwasher and reverse osmosis filter?
Yes. The AIR GAP INTERNATIONAL dual air gap has separate ports for a dishwasher hose and reverse osmosis tubing.
Its dishwasher inlet takes a 5/8 in inside diameter hose, the RO port takes 1/4 in outside diameter tubing, and the drain side connects to a 7/8 in inside diameter hose.
How do I choose an air gap finish?
Choose a finish that works with the sink deck and nearby faucet, then check the cap dimensions and body fit. Options here include satin nickel, stainless and matte black.
If you are matching a dark fixture, see our best dishwasher air gap matte black guide.
