Finding the exact size rough-in that you need is as easy as measuring the size that your old model used. You can use a simple measuring tape to measure the distance between the floor bolts that you see and the drain pipe that works with your plumbing system. This helps you narrow down your choices based on the size that you need.
Our top choice is the TOTO Aquia Dual Flush (Check Price on Amazon.com) because it has a sleek design with a curved base that provides plenty of space for you without taking up much bathroom floor space. The dual flush mechanism uses 1.6 gallons of water or less per flush and lets you as little as 0.9 gallons when flushing. This model performs far better than some of the others on our list.
How to Choose the Right One?
How Much Water Do You Want to Save?
You may not know this but you can save a significant amount of water just with a quick replacement of your old toilet. Older models can waste thousands of gallons in just a few short months. One that has a gallon per flush rating of 1.28 will use up to 17,000 less gallons over the course of a year.
The problem with this ultra low consumption rating though is that it may not be strong enough to remove the waste that you see in the bowl. It’s often better to pick one with a rating of 1.6 gallons. This helps you save water and keep the bowl clean at the same time.
How High Do You Want to Sit Off the Floor?
Manufacturers typically use terms like comfort height, standard height or chair height to describe the distance between the seat and the floor. You need to make sure that this refers to the height from the seat and not the rim. When you add a seat, you may wind up several inches higher in the air.
Chair height is a distance similar to the distance between the seat of a dining room chair and the floor. Standard height is usually around 16 inches. A manufacturer might use comfort height to describe a shorter distance from the seat to the floor.
Did You Measure Correctly?
A 10-inch rough-in means that the distance between the bolts on the base and the drain pipe in the wall is exactly 10 inches. Manufacturers make models with a rough-in of between 10 and 12 inches, though other models mount right on the wall or closer to the wall. Choosing the wrong rough-in will make it impossible for you to install the product in your bathroom.
Top 10 10-Inch Rough-In Toilets on the Market
TOTO Aquia Dual Flush
Located right on the top of this Aquia model is a push button that functions as the flush lever, but this mechanism flushes in two different ways to use more or less water. One setting uses just 0.9 gallons and is perfect for liquids, but the other setting uses 1.6 gallons and flushes larger and thicker forms of waste. The tray in the base is larger to keep any waste from clogging the system.
Made from two separate pieces, the Aquia connects together to take up less space and to bring the base closer to the wall. It also comes with an attached seat.
Uses a small amount of water but eliminates more waste than similar models
Mounts to the floor and installs with or without the use of the included wax ring
Has a closely connected tank and bowl to save you even more floor space
Using too much pressure can break the push button
Stands more than 17 inches off the floor, which is too high for some
KOHLER Highline Classic
The Highline Classic has a more classic look than other KOHLER models do that features a tank on the top with sharp edges and lines and a base that sits closer to a bathroom wall. This base has an elongated shape on the bowl that supports your lower body, but it also has a comfort height that lets you sit closer to the floor when using the bathroom.
One of its top features is that it uses Class Five technology, which creates the powerful suction needed to remove bulk waste from that elongated bowl. This prevents streaks from sticking and stains from forming on the sides of the bowl.
Class Five technology ensures that it flushes bulkier and larger pieces of waste
Features a chrome flushing handle on the right side of the tank
Has a comfort height that reduces the distance between the seat and floor
Comes in a slightly darker finish that might not work in your bathroom
May not come with a seat that works with the elongated bowl
The comfort height of the Cimarron makes it easier for you to sit down when you need to use the restroom and get back up without any discomfort in your lower body. That height also makes it suitable for use in bathrooms designed for those with disabilities. They can easily slide over from a device like a wheelchair.
This set includes both a separate base with a bowl inside as well as a tank, and both pieces have the same design and finish. Though it does not come with a supply line or a seat, it does have a round bowl that takes up less space than similar bowls do.
Comfort height makes it easier for you to stand back up after sitting down
Comes with both a separate bowl and tank in a matching finish
Chrome handle is larger in size and easier to use
Round bowl is very small
Does not come with a matching seat
Though similar to the other Highline on our list, this one is a little different. It still has the same comfort height though, which increases the height of the seat rim to 16.5 inches. You’ll need to add your own seat because this model does not come with one, but that seat lets you further increase the distance from the floor for added comfort.
Two top features of this product include its canister valve and its Class Five flushing technology. Those two features work together to remove waste and leave the bowl as clean as it was before you used the bathroom.
Has a height of 16.5 inches from the floor to rim that you can increase with your own seat
Canister valve provides the smooth suction needed for bulk waste
Has smoother sides on the tank and base that you can easily clean
Smaller trapway is susceptible to clogs
Water can build up inside the base and cause damage to the wax ring
American Standard 270AB
The first American Standard product worthy of inclusion on our list is the 270AB, which comes with the company’s patented Ever Clean surface. This surface is resistant to all the common hazards found in most bathrooms, including mold and germs. It prevents mold and mildew from growing anywhere on the product and keeps bacteria and other microbes from spreading to other parts of the room.
As one of the only ADA compliant models on the market with an elongated seat and bowl, this model is great for those using handicap devices like a wheelchair or a walker. Inside the tank is a larger valve that works with a flapper that is bigger in size too. This flapper will not break down when exposed to the chemicals you use to clean the product or the minerals in your water supply.
One of the only ADA compliant models for sale with an elongated bowl
Ever Clean surface resists the growth and spread of microbes and bacteria
Large flush valve has a flapper that resists chemical damage
Bowl has a very low water level when completely filled
Cracks and scratches can develop with regular use
The elongated bowl shape found on the Transitional makes it suitable for use by any adult or child. This shape extends the bowl out from the tank and from the wall to keep you from feeling confined when you sit down. As it has a higher height from the floor, you won’t have any issues standing back up after sitting.
Located on the left side of the tank is a chrome flushing handle that matches the chrome and stainless steel hardware and decorations in your bathroom. These lever pushes down with minimal pressure and returns to its original placement once you release it. This product comes with an E-Max flushing system that uses just 1.28 gallons of water but still leaves the bowl looking completely clean.
Elongated bowl offers more comfort and allows the water level to climb higher
E-Max flushing system removes more of the liquid and solid waste inside with less water
Uses only 1.28 gallons to flush the bowl and fill the tank
Comes with holes for mounting a seat but no seat
Flushing handle turns down easily and then moves back to a center position
American Standard Colony
The Colony is a good choice for those looking to save money and save on cleaning time. Not only is it a more affordable option from the manufacturer, but it comes with a power wash system created by American Standard, which places holes all around the rim of the bowl. Those holes allow the water that comes down to push out waste to clean the bowl at the same time.
Both the trapway and the flush valve on this model are two inches and work together when you flush to create more action. Gravity causes water to move from the valve and push down any water and waste in the tank into the trapway.
Uses 1.6 gallons of water with each flush you make
Comes with a flush valve and trapway of the same size that produce more jet action
Power wash system scrubs and cleans the bowl interior with one flush
Runs loudly when you flush
Does not come with the seat you see in images from the manufacturer
TOTO Aquia Elongated Bowl
With this version of the Aquia, you can create the look that you want in your bathroom because this comes with just the bowl and not the tank. It has a slimmer design that lets it sit closer to the tank that you select or to the wall. Though the elongated bowl gives you a little more space, this model cuts back on the size of the seat and bowl.
You’ll also like the dual flush option found on this product. One button lets you use either 1.6 or 0.9 gallons of water to flush down your waste.
Dual flush button uses more or less water when flushing liquids or solids
Elongated bowl gives you more space while reducing the size of the seat
Can sit close to both a separate tank or a wall
Will need a new or existing tank
May take some practice to figure out how much water to use
This Windham model might just be one of the easiest ones to install because it requires just three bolts to mount it to the floor. You will need to purchase a separate wax ring and some other parts before your plumber installs it, and it does not come with a seat either. It does use a vitreous china of Grade A that will last for years without showing scratches and damage.
You’ll also like that it uses 1.6 gallons for flushing most types of waste. That helps it meet water conservation guidelines and may qualify you for a rebate.
Made from Grade A china that is more durable and resistant to stains
Meets water conservation guidelines because it only uses 1.6 gallons per flush
Mounts and installs to the floor with just three bolts
Only comes in a biscuit finish that is darker than classic white
Does not come with a wax ring or any of the other installation parts that you need
TOTO Drake Elongated Bowl
Whether you already have a tank in your bathroom or want to buy a tank, this Drake bowl from TOTO will work in your bathroom. Though it does not come with a seat or a tank, it does have a three-inch flush valve that fills the bowl faster with water from the attached tank. It is also compatible with other products from TOTO like its Washlet integrated products and its soft close seats.
Most customers love the G-Max flushing system found on this model. This system reduces the noise that you hear during and after flushing but still provides the power needed to flush down bulk waste.
G-Max flushing system provides the powerful flushes that you need without producing a lot of noise
Compatible with the Washlet systems and soft close seats that TOTO makes
Features a wider three-inch flush valve that fills the bowl faster
Requires a separate tank for using
Lacks any type of seat
Verdict: Our Top Pick
The Aquia Dual Flush from TOTO is our top pick because it uses dual max flushing technology to remove more waste with every single flush. It comes with a flushing mechanism that lets you press one of two buttons to either use 1.6 gallons or just 0.9 gallons of water, which uses the right amount of water based on whether you have more or less liquid or solid waste in the bowl. This button has a chrome finish that adds a more stylish touch to the tank.
It has a skirted base to keep dust out of the working components and an elongated seat designed to increase your total comfort. This model has a universal height design that is also a standard height, which allows adults of all sizes to sit down with minimal discomfort. TOTO designed this one to come in two boxes and to include an integrated seat.