Does A Double Sink Vanity Share The Same Drain

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Double vanities have two sinks. Each sink needs a drain. P-traps are not required for two sinks. Typically, they share one trap. It’s possible to have two if, for some reason, that works best for your application, but you’ll just spend money you don’t need.

What is a double sink vanity?


A double sink vanity is a bathroom vanity with two sinks. This is a great option for couples or families who want to be able to get ready at the same time. It also helps to keep the bathroom organized and tidy.

It’s a great way to provide two separate areas in a shared bathroom. This can be really helpful, especially if you have a lot of people using the bathroom at the same time. In order to make sure that both sinks can be used comfortably and at the same time, you’ll need at least 5 feet of space between them.

The double sink is a statement piece that can reduce wasted space in a large bathroom and create a striking centerpiece. It can also add value to your property.

Can you connect two sinks to one drain, and how?

A double vanity can offer two sinks in a bathroom by adapting supply and drain pipes. It may be required to vent each sink separately depending on your local plumbing codes and set up in your bathroom.

It is not advised to connect two sinks to the same drain. It may result in drainage issues in the future and two faulty sinks.

If two sinks have two separate p-traps, air pockets may block the other sink’s drain, and slimy microorganisms may grow between the two p-traps.

Sinks come with a drain, a hole under the sink, and a p-trap, which is a pipe connecting two drains with a horizontal pipe, giving the whole structure a shape of a letter P.

Cap the Water Pipes:

When connecting two sinks to one drain, the flexible water supply lines need to be pulled and the water supply lines capped.

Disassemble the Vanity:

Then, remove the sink and countertop. Then, install the new cabinet and add drywall behind the cabinet.

Install Drain Pipes and Traps:

The next step involves connecting two drains to a new sink. Then you can connect the hot and cold water supply lines.

Should you do this project

It is possible to connect two sinks to one drain pipe, but it’s not as straightforward as connecting a sink to a drain. You’ll need a tee, which is a connector that allows you to join two pipelines. The tee is connected to the sinks and then feeds into a single P-trap that connects to the drain.

If you’re connecting two sinks to one drain, it’s best to cap off the shutoff valves. This will prevent water from flowing through the pipes when they’re not in use. Another option is to pull out the flexible water supply lines while they are still connected to the shutoff valves.

How do I plumb two bathroom sinks in one drain?

One of the biggest issues is how to properly install a double sink vanity.

In order to share a single drain, you need to install the sinks with a minimum distance of 30 inches between their center lines. This means that you need to cut off the tails of both pipes that extend from the drains.

Then, you need to affix the drain assemblies to the sinks before you install them in the cabinets. Hold one end of a 4′ level against the drain openings in the walls and center the bubbles.

Cut the tails of the pipes that extend from the drain assemblies using a hacksaw. Point the outlets of the tees down and connect them to the mouths of the P-traps.

Now, you just need to turn on the water supply and start enjoying your new bathroom!

What are the benefits of using a double sink vanity?

Double sinks are more expensive than single sinks and are more difficult to install, maintain, and clean.

Some benefits of using a double sink vanity are that it can help to create a more spacious look in a bathroom, it can make it easier to get ready in the morning, and it can help to keep the bathroom organized.

When you have two people in a home, it can be difficult to share one sink. This is where the double sink vanity comes in handy!

Not only does it make the room more attractive, but it also provides each person with their own sink. This can be helpful for people who just need to get things done before heading out the door.

What are the different types of double sink vanities?

If you are remodeling a bathroom, you need to know different types of bathroom vanities to get a proper bathroom vanity.

Pedestal Sink

A pedestal sink is a powerful-looking sink that can be used in any bathroom and can be fitted with one of many different types of add-ons.

Free Standing

Vanity with a square or rectangular design and one or two sinks is available in a variety of design choices and finishes.

Wall Mounted/Floating

A wall-mounted vanity is mounted onto your bathroom wall. When using it, you should be careful not to add too much force to the surface.


Vessel vanities are common in fancy restaurants and hotel lobbies. They can take up quite a bit of space, depending on what you plan to use them for.

Under-Mounted Sink

Under-mounted sinks offer a more refined and modern look to the vanity as the basin is built directly into the vanity, adding a flatter appearance overall.

Vanity Cabinet

The last option is a vanity cabinet with a classic design. It serves as a basic option for your design needs that isn’t too complicated.

Common Materials Used in double sink vanities

When getting a bathroom vanity, your materials should be able to handle moisture and humidity and be strong enough to handle the weight of the faucet fixtures and any other decorative items you might add.

Solid Plywood

Wood is a good option for your vanity, but solid plywood is stronger and better able to handle moisture than many other forms of wood.

Particle Board

Particleboard is a composite material used in many vanities. It is covered with a veneer or melamine to add a refined style.


The top part of your vanity might be made using a laminate material for a better look. It can be painted to create a powerful tone that can last for a while.


Vanity tops can be made of marble as well. You can add a cool and smooth surface that can handle a variety of conditions. Although marble surfaces can sometimes be hard to spot stains, you will need to clean them regularly.

Vanity Shapes and Sizes

Cabinets are found in a variety of vanities. Some may be made with drawers that pull out and traditional doors that you can open.

Double sink vanities come in a variety of shapes and sizes, 

  • Square
  • Round
  • Rectangular

A good size vanity is 30 to 40 inches in height, 16 to 25 inches deep, and about 5 to 8 inches in diameter.

There are several features that you can look for in a vanity, including soap pumps, towel posts, and matching frames for mirrors.

Countertop space

Another feature that is common among double sink vanities is the amount of countertop space that they provide. With two sinks, you will have more countertop space for grooming tasks than you would with single sink vanity.

This extra space can be very useful, especially if you like to do your makeup or shave in the morning while you’re getting ready for work.

How to install a double sink vanity

Vanity includes a sink, a cupboard that hides the plumbing, and a mirror. These come in all shapes and sizes to fit into any bathroom.

Installing a new vanity requires assembling the cabinets, cutting holes for the plumbing, placing the counter, and attaching the vanity to the wall.

The size of a double vanity is more important than the number of sinks you get. The recommended amount of space to add a double vanity is at least 60 inches, and some double vanities are as small as 48 inches.

When choosing a double sink vanity, remember that you’ll have to give up something else in the bathroom, such as storage or a laundry area. Also, be aware of the building codes that apply in your area.

Installation costs for a double vanity in the US can vary widely and depend on the features you require. A premade vanity can cost from $100 to $2,600, while a custom vanity will be more expensive at $500 to $2,800.

If you need to remove a wall or install new plumbing, these costs will add to the total cost of the bathroom remodel.

The cost to replace a vanity might go anywhere from $650 to $3,300, depending on the services needed.

When going from a one to a two-sink bathroom, you can use a single trap for both sinks, but make sure there are at least 24 inches between the sinks.

How to use a double sink vanity

A double sink vanity is a great way to add extra counter space and storage to your bathroom. Here are a few tips on how to use a double sink vanity:

  • Use one sink for washing and the other for drying.
  • Use one sink for grooming and the other for storage.
  • Use one sink for makeup and the other for hair products.
  • Use one sink for toothbrushing and the other for flossing.

Double sink vanities are becoming more and more popular in homes across the country. This style of vanity is a great way to save space in your bathroom, and it’s easy to use. All you need to do is install a fitting to the current centered drain opening and connect it to the trap.

It’s easy to install, and it doesn’t require any special skills or tools. Plus, it’s a great way to save space in your bathroom.

How to clean a double sink vanity

To maintain your bathroom vanity, consider the different features. This includes the sink, countertop, and vanity cabinets.

Porcelain / Vitreous China

Porcelain is a beautiful material for vanity sinks, which can be damaged by scratches, chips, or stains with age.

To maintain your porcelain sink, wipe it with a soft cloth and rinse off any soapy residue. Avoid dropping heavy items into the sink and avoid using harsh abrasive cleaners.

A little hydrogen peroxide or liquid oxygen bleach alternative is effective at diminishing the appearance of scratches and stains on porcelain, and vinegar can be used to remove stains.


Glass is a durable and versatile sink material that can be shaped into different colors, shapes, and patterns. It is easy to clean with liquid soap and water, and microfiber cloths are ideal for everyday use.


Copper is a beautiful sink material, but acid, abrasive chemicals, some cosmetics, and even your body’s natural oils can strip the patina from a sink. Rinse the sink thoroughly after every use and apply a copper-specific protective coat if needed.

Lava Rock / Stone

Lava rock is a specialty sink material and requires a little more conscientious care. Avoid acid-based or abrasive scrubs or cleansers and dry with a soft dry cloth after use to prevent water spots.

Petrified Wood

Petrified wood sinks are easy to maintain and clean as they come polished with a sealant. Avoid harsh or acidic household cleaners on petrified wood sinks.

Caring for Your Faucet

Faucets and water levers come in a couple of different materials and finishes. You can use a mild cleanser and a microfiber cloth to clean. However, a drop-in sink will require a rim that needs to be cleaned around.

Caring for Your Vanity Countertop


Quartz countertops are resistant to mold, mildew, and bacteria and require less maintenance than other stone countertop varieties. Wipe down spills as soon as possible to prevent discoloring, and use alcohol to remove stains.


Marble countertops require some upkeep, as they require regular sealing about every 3-6 months. To remove stains, a paste of baking soda and hydrogen peroxide can be left on to dry.


Laminate countertops are a versatile, inexpensive, and hardy option for your bathroom vanity countertop. To remove stains, use baking soda, and a mild household cleanser applied to the stain for five minutes.

Caring for Your Vanity Cabinet

This is the base cabinet of your bathroom vanity that holds your toiletries and other care or cleaning items. It is freestanding or attaches to the wall.

Laminate vanity cabinets are an affordable option to wood cabinets that are easier to clean. Using a microfiber cloth and gentle soap and water will help keep the vanity’s appearance.

To maintain the beauty and functionality of your bathroom vanity, use the gentlest soap possible (non-abrasive and non-acidic), and avoid harsh scrubbers and dry spills promptly.

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