How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (2022)

You are probably wondering how high the kitchen sink drain should be from the floor. Look no further. We have researched all about the location of kitchen sink drains for you.

The standard height of a kitchen sink drain from the floor is between 20 and 24 inches. This varies based on the vanity, sink, and trap.

Continue reading to learn more about the proper ways to install a kitchen sink drain, what the rough-in height is for kitchen sink drains, whether or not a sink drain has to be centered, whether or not you can install a deeper kitchen sink, as well as how to measure a kitchen sink drain.

How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (1)

Installing a Kitchen Sink Drain

The best practice when it comes to installing a kitchen sink drain to achieve its ideal height from the floor is to first be sure your measurements are correct. As the saying goes, "measure twice, cut once." This means you should double-check your measurements before cutting the materials so that you get things right the first time.

How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (2)

This applies to measuring what is needed for your kitchen sink drain to achieve the ideal height. You must consider what measurements are needed to ensure that you are able to complete a project the first time you attempt it. This saves both time and money.

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The necessary measurements to help you determine the rough-in height for your kitchen sink drain depend on a few variables. You have to factor in the height of the countertop, as well as the depth and width of the sink that you choose.

Bathroom faucets come with a drain while kitchen faucets do not. Pay attention to this when choosing a kitchen sink. Make sure the sink comes with a drain or you will have to purchase one that is the right size for the sink you have. It depends on the brand whether or not your sink comes with a drain.

How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (3)How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (4)

Click here to see this double sink on Amazon.

What is the rough-in height for kitchen sink drains?

How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (5)

The average rough-in height for kitchen sink drains varies between 20 to 24 inches from the floor. The preferred height is dependent on the counter and trap. You are able to adjust the height of the sink drain and depth while going through the installation process.

A few aspects to consider when determining the rough-in height for your kitchen sink drain are the location of the p-trap, pipe connections, type of sink, and the height of the countertop.

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When you take measurements make sure that you account for enough room for the p-trap to be located 24 inches or less below the sink drain. If your sink drain is closer to the ground, your p-trap will be closer to the drain than 24 inches. It all depends on the depth of your sink and the height of your vanity.

For example, if your sink vanity measures 40 inches in height at the countertop, with an 8-inch depth of the sink, the drain would then have 32 inches between the floor and where it is. You can choose the height of your countertop first and then the depth of your sink before figuring out where the drain will sit.

Does a sink drain have to be centered?

A sink drain does not necessarily have to be centered. On the other hand, the sink drain does have to be installed in such a way that the water will be able to get to it so that the sink still drains.

An example of kitchen sinks with an off-center drain is those made by Haven's Luxury Metals. Having the drain off-center provides the same functionality as a double-bowl sink.

A drain that is off-center allows you to set dishes in the middle of the sink without blocking the drain and makes it so that you are able to prepare food on one side of the sink and dry dishes on the other side simultaneously.

Are the pipes under my kitchen sink centered?

Not always. In fact, there are different traps such as a J-shaped, C-shaped, and U-shaped traps. You will need to move the p-trap depending on what shape it is and if you can easily do so. The most commonly used p-trap is a U-shaped trap.

Whenever the pipes under your sink are off to one side, you have more space available for storage. This also allows you to install wider drawers if you want to.

(Video) How To Install a Kitchen Sink and Drain For Beginners | Church Flip | Episode 7

Can I install a deeper kitchen sink?

How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (6)

Yes, you can install a deeper kitchen sink as long as the counter you choose is high enough to allow for the pipes that have to be installed below. A lot of people like to have a deeper sink so that they have more room for dirty dishes. Having a deeper sink also gives you enough space to wash your hands without feeling like your hands are laying in the bottom of the sink.

It is important to be mindful of the fact that you will have less space between the sink drain and the floor if you install a deeper sink. This is okay as long as you install piping meant for a smaller space. If you install a deeper sink, the sink drain will be closer to the ground than it would have been otherwise.

How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (7)How High Should Kitchen Sink Drain Be From Floor? - Kitchen Seer (8)

Click here to see this on Amazon.

How do you measure a kitchen sink drain?

In order to measure a kitchen sink drain properly, you must first measure the height between the floor and the top of your counter. Next, you must consider the depth of the sink that you want to install.

As long as the p-trap is installed no more than 24 inches below the sink drain, you should be fine. Measure the height of your countertop then subtract the depth of your sink to determine how much space you will have between your sink drain and the floor.

(Video) Kitchen Sink Plumbing - How to Replace a Kitchen Sink Trap

In Closing

The rough-in height for the kitchen sink drain is between 20 and 24 inches. This varies depending on the height of the vanity or counter and the depth of your sink. The taller the vanity or more shallow the sink, the further from the ground your sink drain will be placed.

Not all kitchen sinks come with a drain. Depending on the brand of kitchen sink that you buy, you might need to purchase a drain separately.

A sink drain does not necessarily need to be centered. If the drain is off-center it must be installed in such a way that it is the lowest point of the sink. An off-center drain makes it so that you can use the sink for multiple reasons at the same time.

The pipes under your sink are not always centered. If they are off to one side, you will have more space for the drawers and storage underneath.

Installing a deeper kitchen sink simply means the sink drain will be closer to the ground. You must be sure to get the correct piping to properly fit in the space remaining between the sink drain and the floor.

Measuring a kitchen sink drain requires you to measure from the floor to the bottom of the sink that you choose to install. If you install a deeper sink, this measurement will change.

Before you go, check out the following links related to kitchen sinks:

(Video) How to Install the Plumbing for a Kitchen Sink | This Old House

How Deep Are Kitchen Sinks?

15 Awesome Under-Kitchen-Sink Storage Ideas

5 Ways To Waterproof Cabinets Under The Kitchen Sink


How high should a kitchen sink drain be from the floor? ›

The standard kitchen sink is 8 inches deep, which means that the normal distance between a kitchen sink drain and the floor is 28 inches. This will vary, depending on the height of the counter and the depth of the sink bowl. In the bathroom, the sink drain is typically between 24 inches above the floor.

How high does a sink drain need to be? ›

Sink Drain: 18”- 20” above finished floor.

How far should a sink be from the floor? ›

When it comes to choosing your bathroom sink height, you need to decide where the sink is going to be positioned. This will usually be determined by the existing water supply. Most plumbing experts say a comfortable basin height is considered to be somewhere between 800-850mm.

What is the best height for a kitchen sink? ›

While there is no perfect formula for identifying an ideal sink depth, sinks are typically mounted 36 inches from the floor and can span anywhere from 6 to 12 inches in depth, with the majority of modern sinks ranging between 8 to 10 inches. Specific calculations may be made in correlation to a user's height.

How do you set the height of a drain? ›

Combine the thickness of the floor tiles and the mortar bed where it meets the drain. To this, add 1/4 inch for the paper and wire substrate for the mortar bed, and 1/8 inch for thin-set mortar. The result is the height of the drain from the surface of the concrete slab or wooden subfloor.

Can a sink drain be higher than the sink? ›

As long as your sink is above the drain it will work.

How much does a sink drain need to drop? ›

But do you know the proper slope? The ideal slope of any drain line is ¼ inch per foot of pipe. In other words, for every foot the pipe travels horizontally, it should be dropping ¼ inch vertically.

What is the general height of basin from floor level? ›

The standard height for a washbasin is around 800mm - from floor to lip of the washbasin. This should be roughly the same for all washbasin types, including those fitted within a vanity unit.

What is the maximum counter height above the finish floor for a sink? ›

ADA Sink Height and Clearance

When sinks are installed into a countertop, they should be placed as close as possible to the front edge for maximum accessibility. The sink must also be installed so that the highest point (either the front rim or the countertop) is a maximum of 34 inches above the finished floor.

What is the most popular kitchen sink size? ›

The most common sizes for a kitchen sink are 30" or 33", however a standard size could measure anywhere between 24" and 36" in length. The bulk of what you find while shopping will fall within this size range. Generally, sinks up to 30" will contain one large single bowl.

Are kitchen double sinks outdated? ›

Double-bowl sinks aren't generally used that way anymore, since dishwashers took over. It's also common to keep a rack in the second sink where washed items can air-dry; some double-bowl units come with an integrated cutting board that fits over one sink for extra work surface.

Can kitchen sink drain go through floor? ›

Trap Type. Sink drains that exit through the wall behind the sink require a P-trap, and sink drains that exit through the floor beneath the sink require an S-trap. Both traps serve to hold water in a U-shaped curve, which prevents sewer gases from rising through the drainpipes.

Does sink drain location matter? ›

Your drain's position will affect a number of things, including under-sink storage, faucet noise, and how easy it is to stack dishes.

How often should you pour water down a floor drain? ›


So, if sewer gas is a problem and your floor drains don't get much water flowing into them, be sure to refill the traps about once a month. And at least twice a year, you should really give that drain a workout.

What is a good rule of thumb for installing drainage? ›

The general rule of thumb is to provide a grade of 1/2 in. to 1 in. per foot for a minimum of 6 to 10 feet on all sides of the house. That's a drop of 5 to 10 in. over 10 ft.

Can sink drain be higher than P-trap? ›

It is not ideal to have the p-trap below the the exit drain because water gravity has to force the water out instead of it flowing downwards naturally. They both work and have seen it many times. But essentially anything below already creates its own p-trap- so using another is redundant.

What size drain should a kitchen sink be? ›

The 1½-inch size is used to capture water that might flow out of a kitchen sink, a bathroom vanity or a tub. The two-inch pipe is commonly used to drain a shower stall or washing machine, and it may be used as a vertical stack for a kitchen sink. A three-inch pipe is what's used in homes to pipe toilets.

How far can a sink drain run horizontal? ›

If you have 1 ¼-inch pipe, the horizontal distance of the vent should not be more than 30 inches. For a 1 ½-inc pipe the vent should be 42 inches away at the most while a 2-inch pipe must have a maximum distance of 5 feet.

Can you put a 90 in a sink drain? ›

It's a bad plumbing practice to have a hard 90-degree bend in a horizontal drain line that's buried in a slab or otherwise hidden. If you have to make a 90-degree bend, use two 45-degree fittings and put a small piece of straight pipe between the fittings, if possible.

How do you calculate the fall of a drain? ›


For example, calculate the fall in a 50 metre section of foul water pipework if the gradient is to be 1 in 80. A gradient of 1 in 80 is converted to a number instead of a ratio.

What fall should a sink waste pipe have? ›

The minimum fall for a waste pipe is 1 in 40. The maximum fall is 1 in 110 (apart from vertical pipes but that's a different story). So pipes with a gradient between 1 in 40 and 1 in 110 should have adequate flow to prevent blockages from occurring.

What are ADA requirements for kitchens? ›

40” to 60” inches wide: The kitchen should be at least 40” wide to 60” wide in order to be ADA compliant. If the kitchen is a pass-through kitchen (meaning it has two points of exit/entry), then it should be at least 40” wide. For U-shaped kitchens, the kitchen needs to be at least 60” wide.

What is best countertop height? ›

Deciding your kitchentop height above or below 36” standard

The standard height should be between 38”-39” for people above-average height. 32” is good for below-average height people. In case of disabled people and wheelchair users, the height of countertop should be 31”-34”.

What is the ADA requirement for a kitchen countertop height? ›

ADA counter height requirements dictate service counters must be under 36 inches high and less than 36 inches long. They also must have at least a clear 30 by 48-inch area in front of them for adequate wheelchair access. Different counter types have their own specifications, though.

How far below sink does drain pipe need to be? ›

According to the International Residential Code, the maximum vertical distance between the sink drain and the entrance to the p-trap is 24 inches.

What is the rough in height for a vanity drain? ›

The water supply line runs out of the wall into a hole in the back of the vanity, typically placed at a height of 22 to 24 inches from the finish floor. The sink drain is then situated just 4 inches inward from the water supply line.

What is the standard depth of a drain? ›

On average, trenches should be around 12-24 inches-deep, and wide enough to house your pipe comfortably before filling it in with soil and sod. As we've mentioned, in cold weather regions, this will need to be deeper or you'll have problems with your sewage freezing.


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