Rear Discharge Toilet Problems, Benefits, Best Options

Today let’s talk about rear discharge toilet problems, benefits, and the best options on the market.

If you have an older-style bathroom at home that you would like to modernize with a modern design, you could choose the toilet with a rear discharge. If you’re thinking of making changes to your bathroom you must think about purchasing a toilet that features the back flush or rear discharge. Toilets with a rear discharge are becoming sought-after all over the globe. It is because they provide numerous benefits to users.

The toilet that is mounted at the rear is placed on the bathroom floor similar to a normal toilet. However, instead of flushing waste down floors, this toilet flushes backward through the wall that is behind. Buildings, homes, and other dwellings with floor tiles are using this kind of toilet to run the waste pipe through the wall instead of through the floor’s concrete surface.


rear discharge toilet problems

The rear-discharge toilet is also referred to as an outlet at the rear or Back outlet toilet a type of toilet that lets its waste out from the back of it and into the wall. Some toilets discharge their waste through their bottoms and the floor.

Toilets with rear discharges are ideal for apartments with high rises. This is due to the fact that they don’t require plumbing through the floor, and therefore the floor does not require a thicker floor. This makes it easier for floors to be built as opposed to those with toilets that are outlet-type floors.

Rear discharge toilets are ideal if your bathroom or your home are located away from sewer lines. They allow you to effortlessly connect the waste that comes out of the toilet to sewer lines.

Another advantage of installing the rear discharge toilet is that they’re cheaper to set up as compared to floor outlets in bathrooms that do not have a drainage system. If you have an outlet toilet that is floor-mounted, you’d need to tear out the entire floor of your bathroom for the plumbing to be installed. A toilet with a rear discharge requires you to cut an opening in the wall. This is simpler and less expensive.


Finding a reliable rear discharge toilet could be much more difficult than the floor outlet toilet. There isn’t sufficient information about this issue which is why I am writing this post.

I’ve conducted extensive research on this subject and looked at different toilet models to decide which is a good buy. I came to 4 models I consider to be the top of the line currently.

KOHLER Barrington

Kohler 3652-0 Bath Hardware, White
  • 30-inL x 20-inW x 30-inH
  • Pressure Lite Flushing System
  • Elongated, Rear-Outlet Bowl
  • Includes Trip Lever, Less Seat and Supply
  • Meets Strict Flushing Performance Guidelines Established by the Epa (Environmental Protection Agency) Watersense Program

Kohler K-3652-0 Barrington Pressure Lite is a single flush single-piece elongated normal height rear outlet floor-mounted toilet. Available in black, white almond, and biscuit.

If you’re looking for an effective flushing and water-efficient rear discharge toilet, this is it. It’s a pressure-assisted toilet fitted with Sloan’s FLUSHMATE pressure-assist technology. If you’re not familiar with much about Sloan they are market leaders in the production of toilets with pressure-assisted systems.

For each flush, the Kohler Barrington requires only one gal of water. It has therefore been recognized by the Environmental Protection Agency’s WaterSense along with the California Energy Commission. The toilet is therefore eligible to be eligible for the water rebate program and is available for sale anyplace within the United States. The characteristics and specifications are:

  • Chrome trip lever in polished chrome.
  • 12 x 10 inches of the Surface area of water.
  • rough-in of 4 inches.
  • 35-80 psi pressure range for working pressure.
  • 1-1/2 inch trapway.
  • Depth: 29.25 inches.
  • Width: 21.25 inches.
  • Height: 31.5 inches.
  • Bowl height 15 inches.

One reason why Kohler toilets are a great choice is due to the fact that they have various colors to pick from. I personally love their black toilets. If you’re planning to choose the black look, this is an excellent option. If you want to choose the standard white color, you’ll never regret it.

It is similar to its counterpart, the American Standard Yorkville does not come with the comfort height. If you’re a tall person or prefer a height-adjusted toilet over an ordinary height toilet, this is not for you. The toilet bowl that is elongated is, however, better than the standard round one.

Another thing that you might be unhappy about is the fact that this toilet doesn’t include a seat for the toilet as well as a wax ring or the water line. It is, therefore, necessary to buy these separately. If you’re in search of an excellent seat from Kohler I’d like to suggest the Kohler Cachet slow-close toilet seat.

In addition to the above reasons, Kohler Barrington is a fantastic front discharge toilet. It is covered by a one-year extended warranty.

SANIFLO 023 Sanicompact

SANIFLO Sanicompact - Dual-flush System - Residential
  • BONUS HALF BATH: The Sanicompact is a self-contained dual-flush toilet system used to install a half bathroom up to 9 feet below the sewer line, or even up to 120 feet away from a soil stack. For residential use only.
  • DUAL PURPOSE: The Sanicompact will also discharge gray water from a sink. The wastewater drains into a 1.25” hose connection in back of the toilet.
  • EFFICIENCY AT ITS FINEST: The standard dual flush version uses 1.28 gpf or 1 gpf and uses less water than any regular toilet but with the same efficiency. The push button activates a timer and a solenoid valve in order to fill and wash the bowl.
  • TECHNICAL SPECIFICATIONS: Motor: 0.5 HP oil-filled thermally protected; Noise level ≤ 53 dBA (Lp) (measured at 3 ft.); Discharge rate at 9 ft: 24 GPM; Certification code: CSA (IPC, NSPC); Connections: Sink
  • 4 YEAR WARRANTY: All of Saniflo's products have a 2 year warranty with purchase, and an additional 2 years is added with registration. Our warranty program can offer peace of mind, should a problem arise.

It is the Saniflo 023 Sanicompact self-contained toilet is an upflush toilet. The upflush toilet can also be known as a macerating toilet. A macerator is a device behind the toilet which grinds and mixes human waste and toilet paper into a slurry. It is then it is pumped out at the bottom side of the bathroom.

If you’re in search of an option to put a toilet in your basement bathroom or any other bathroom in which you do not want to take down the floor to install a floor outlet toilet, then this is the toilet you should purchase. It can pump vertically capability of up to 9 feet, and horizontal pumping of up to 120 feet.

The first time I came across this toilet, I thought “Where can I find the tank”? What I did not know is that the toilet doesn’t require a tank because the water comes from lines with high pressure, which can clean the toilet. This makes it an un-tank, macerating, as well as a rear discharge toilet all in one.

Some of its specifications and features include:

  • One-piece toilet.
  • Longer bowl.
  • 1/1.28 GPF dual flush toilet.
  • Depth: 19.5 inches.
  • Width 14.25 inches
  • Height: 18.25 inches.
  • Bowl Height: 18.25 inches.

Saniflo Sanicompact toilet, though it is one with a back discharge releases its waste differently from other toilets that discharge their waste from the rear. It does not require an outlet flange in order that connects the outlet to the wall, but rather a pipe of a smaller size that runs directly away from the macerator.

This being a small toilet allows it to be placed in places where other toilets can’t be installed. The small size isn’t the only thing it comes with a comfortable bowl with a rim height of 18.25 inches. This makes it easy for tall and older individuals to stand or sit at the door of the toilet. Another feature worth mentioning is the soft-close toilet seat, which stops the annoying sound of the toilet seat.

To make this toilet work it needs an electrical outlet. This is necessary to power the pump for the macerator. If you reside in an area with no reliable power, you may not be able to enjoy this toilet too often.

This is a fantastic alternative for those with smaller bathrooms, however, it is also able to be put inside normal bathrooms without issue. Another excellent option can be an alternative to the Saniflo SaniAccess 3.0 flush as well as the front discharge toilet. It is able to pump waste more than it does the Saniflo Sanicompact.

Saniflo Sanicompact is a great toilet. Saniflo Sanicompact is a great and gorgeous toilet to look into. To find out more, check the specification sheet and the manual below.

American Standard Yorkville

American Standard Yorkville El Pa 1.6Gpf Comb White
  • Floor-mounted, back-outlet toilet bowl and tank less seat
  • Pressure-assisted siphon jet action
  • High efficiency ultra low consumption (1.1 gpf/4.2 Lpf) uses 31% less water
  • Permanent EverClean surface maintains the cleanliness of the surface
  • Standard 15" (381 mm) rim height

American Standard Yorkville is a single flush single-piece elongated regular height toilet. Available in bone, white, and linen. Its characteristics and specifications are:

  • Fully glazed trapway 2-1/8 inches.
  • 10 inches x 12 inches of the surface area of water.
  • Chrome trip lever made of metal.
  • 25 to 80 psi recommended pressure for working.
  • Depth: 29.75 inches.
  • Width: 20.5 inches.
  • Heigh: 29.25 inches
  • Bowl Height 15 inches.
  • Flush Rate: 1.6 GPF.
  • Rough-in: 4 inches.

It is worth noting that the Yorkville is a toilet that uses pressure and therefore you can be certain that the flushing is extremely strong. From the models I’ve seen, I have yet to discover any that are clogged. Since it is a pressure-assisted bathroom can be noisy and may take time to become used to it, especially if this is your first time using a pressure-assisted toilet.

I am really impressed by the design of this bathroom. Contrary to other toilets that discharge rearwards in which the outlet pipe is clearly visible in the bathroom area, this one was built in such a manner that the toilet’s back is placed in a slam on the bathroom wall, and there are no pipes exposed.

Like the other contemporary toilets manufactured by American Standard, the Yorkville is coated with their trademarked EverClean Surface additive. The coating stops the development of mildew, mold, and bacteria that cause odor. It’s therefore simple and quick to wash the toilet and keep it in good condition for longer.

This toilet is an ordinary height toilet. The bowl’s rim is 15 inches. This is not ADA compliant. If you’re seeking a comfortable height rear discharge toilet, this toilet will be an unintentional disappointment for you.

Another thing to be aware of is the fact that this toilet consumes 1.6 Gallons of water for each flush. This toilet is not WaterSense certified and as such as a consequence, it is not available in some regions of the United States like California.

Yorkville is not equipped with seating. Other than the seat, you’ll be required to purchase accessories for installation separately. The hardware will come with four caps for toilet bolts that match the color of the toilet. The product comes with a one-year warranty.

Signature Hardware Ebler

Signature Hardware 941039 Ebler 1.6/0.8 GPF Dual Flush Two Piece Elongated Toilet with Rear Outlet - Seat Included
  • Two-piece configuration allows for easier access to the area around the toilet
  • Elongated bowl provides extra comfort, extending out an extra 1-1/2" compared to a round configuration
  • Standard seat included
  • Dimensions: 15.5" bowl height x 30.75" overall height x 26.5" depth x 15.75" width
  • QUALITY GUARANTEE: Our products are built to last. We proudly stand behind this product with a lifetime and expert customer support.

Signature Hardware 941039 Ebler is an elongated dual flush, two-piece back discharge toilet. It’s only available with a white-colored finish.

Its features include:

  • Elongated bowl
  • ADA height
  • 6.5 inches rough-in
  • Depth of 26.5 inches
  • The width is 15.75 inches
  • Heigh: 30.75 inches
  • Dual-flush toilet
  • Contoured design

One thing I really like the most about this bathroom is it’s very compact. Its depth is just 26.5 inches, despite it being an extended toilet. This makes it an ideal choice for those who have a tiny bathroom.

Another benefit of the Ever is that it’s very well-designed and designed by a vet. Its intricate design patterns are just beneath the rim, and above the base, which allows it to be noticed.

Cleaning the toilet is an easy task! It comes with a skirted design that eliminates all places in which dirt can be hidden. The bowl is soft and curvaceous, which aside from making it more attractive also makes cleaning it an easy task.

As dual flush toilets, this Signature Hardware Ebler gives you the choice of making use of 0.8 Gallons or 1.6 Gallons of water per flush. This makes it compliant with the specifications of the EPA’s WaterSense as well as CalGreen which means it is therefore available throughout the States within the US.

The height of the toilet bowl is 15.5 inches, which rises to 17 inches for the seat height. Ebler is an accessible toilet. It includes a seat for the toilet, which means you don’t have to purchase a separate seat.

Also included is a P-trap connector when purchasing this toilet. The connector fits into the 3-inch PVC or ABS fitting or attaches to any ABS or PVC hub fitting. The rough-in for it is 6.5 inches.

Signature Hardware gives you a lifetime warranty on this toilet.

Rear Discharge Toilets Flushing Systems

Here’s the truth. If you understand the way toilets work and how they function, then you realize that they rely on gravity to transfer liquid from the toilet to the basin in order for flushing to take place. This is the reason they are referred to as gravity flush toilets.

The siphon effect involves the suctioning of wastewater from the toilet into the drainpipe, which occurs in the trap of the toilet. The trap is situated below the bowl. This can be challenging in rear discharge toilets as the trap isn’t completely as in flush toilets on the floor.

Manual gravity flushing on its by itself will not result in powerful flushing power in toilets with rear discharge. To address this issue rear flush toilets use the flushing wash down system, or the flushing with pressure.

Toilets with rear discharges that wash down are not dependent upon the effect of siphon. They’re designed with an enormous flush valve as well as An extra-large trapway. What this allows is for the water to drain from the tank and into the bowl at a rapid pace that produces more force, and then exits through the trapway at a similar speed which results in a robust flush.

The toilets with a pressure-assisted rear discharge are different from those that come with a second tank within the main toilet tank, which is called the pressure vessel. In the pressure vessel, compressed air is mixed with water coming through the line of supply, thus pressurizing the vessel. After flushing the toilet water gets released from the tank vigorously, and this creates an extremely powerful flush. Toilets with pressure-assisted flushing are thus more loud in comparison to other toilets.

The Main Benefits Of Rear Discharge Toilets

Here are some benefits of rear flushing or back discharge toilet fixtures for your office or at home. In general, there are two kinds of flushing, such as floor flushing or rear flushing models in western-style toilets. If you have an outlet for rear flushing or discharging counterparts in your toilet, it usually is more advantages than those with floor flushing.

The rear outlet toilet is more costly than flushing ones on the floor, however, it’s extremely beneficial to be able to remove waste by using the wall-mounted behind your toilet. If you decide to install this rear discharge unit in place of the traditional type of toilet, it’ll make a great addition to your bathroom, offering a stylish appearance, and in addition, convenience to use.

Rear Discharge Toilet Vs Wall-Mounted Toilet

Wall-hung toilets sometimes referred to as wall-mounted or”wall-mounted” toilets, are those which are fixed to the walls of bathrooms. The bowl is mounted to the wall and the tank is hidden inside the walls of the bathroom.

The look of wall-hung toilets is more stylish unlike rear outlet toilets however they are more costly to install. A wall-hung toilet isn’t as costly as installing it. It is necessary to build an additional wall to hide the tank, and then purchase the frame. The frame that is known as a carrier holds the tank and helps to anchor the bowl.

Look also – What Are The Reliable And Worst Toilet Brands?

The Most Actual Rear Discharge Toilet Problems

Rear Discharge Toilet

I have a toilet that is floor mounted and causing me a lot of trouble. Six years ago, it began leaking on the floor. I changed the wax seal. Over the last few years, it’s been pretty great, but it can leak onto the floor in the event that it is flushed several times in one row. We don’t use the bathroom often and thought it might not be worth taking care of.
It suddenly was really bad. It was when I cleaned the toilet out again and it was all wet there. I am currently drying it out and peeling off the paint that was ruined and the silicon caulking. The seal on the wax was pretty nice and was set.

I’m not an expert, but I thought I would be able to do this task by myself. This kind of job in a major city is extremely expensive. 100 dollars simply to be there.

  1. How severe is this water damage? The floor is made of tile over concrete. However, some walls were damp. Do I have to dry it or spackle the drain, and then repaint it?
  2. It is possible that water leaving the toilet is in a fine manner, but then flows backward through the wax drain seal? I believe that the drain inside the wall can change direction for several inches, and the seal for the drain could be creating backflow? The best solution to address this? Turn the wall screws down a bit to tighten the screws on the wall after I have it back into position? What’s the secret to these?
  3. There aren’t any floor bolts. The person who installed the toilet completed the filling of the toilet anchor with caulking to secure it to the floors? Should I caulk under the drain so that in the event that water leaks, it doesn’t run down the wall or could cause a mess in future road construction?

I’m planning to sell the property this year, so I’m not trying to overdo it on this one. If an inspector doesn’t decide to need a complete repair in the future.


The rear-discharge toilet is a great choice for anyone who wants to install the toilet in an area that is not near drainage lines, or within bathrooms with no drainage on the floor. They are more affordable and quick to put in.

These toilets aren’t very popular like floor outlet toilets, and as the result, there aren’t many available on the market. I would like to hope that the toilet you decide to purchase will be a good fit for you.


Do rear discharge toilets work?

They function by the swift release of fluid from the tank to the bowl, which is then pushed out waste before it is filled with water. The waste is the first to go and then water, resulting in a strong flush as well as a longer drain line.

Why is my toilet not holding water in the back?

A toilet’s fill tube might be damaged or incorrectly placed which prevents the level of water from reaching the proper level. Place the fill tube so that the water flows through the pipe that overflows (the open pipe located near the middle of the tank). If this doesn’t solve the issue, replace the fill tube.

Why is my toilet back flushing?

If the level of water inside the tank is not enough that it “flushes,” the tank fills up with water, and the process begins and over. Some toilets “ghost flush” frequently. Other toilets only ghost-flush occasionally. The amount of time between ghost flushes is contingent on the extent of leakage.

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