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Geberit In-Wall Carrier – Best Wall Hung Toilet Carrier
Exploring Geberit In-Wall Carrier – The Duofix System
Geberit, synonymous with wall-hung toilets, is the preferred choice for many when shopping for a wall-hung toilet carrier. Which, quite frankly, needs no introduction. But if you are only starting to look into a wall-hung toilet, then this article is invaluable for your understanding of a good in-wall tank and carrier system.
What is Geberit and why?
Established in 1874, Geberit is a Swiss multinational group specializing in manufacturing and supplying sanitary parts and related systems. In 1976, it expanded into the USA and established the subsidiary Geberit Manufacturing Inc., headquartered in Michigan City, Indiana. Today, its concealed cistern has over 60 million installations worldwide. The track record is a testament to the product quality and the company’s commitment to excellence.
That’s the first reason you should consider a Geberit in-wall system. The other reasons? Read on.
Table of Contents
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Your Imagination Is The Limit
When you choose a Geberit Duofix carrier, you are opening yourself to the widest range of wall-hung toilets. You’ve got 16 brands with a combined total of more than 150 toilet models; you will either love or hate it. But chances are, you will love the freedom of choice more than the competition could offer.
And that includes all Americans’ favorite KOHLER, TOTO, DXV (American Standard), and other well-known European lines of wall-hung toilets.
The advantage of having a whole host of toilet options presents a unique opportunity to swap toilets without access to any part of the carrier in the wall. You can use a KOHLER bowl now and later found a Duravit model that is even more appealing; you can do a bowl replacement easily without the need to rip out walls. You just need to ensure the replacement toilet bowl model is compatible with whatever Geberit in-wall carrier you use.
Think of it like the Swatch of wall-hung toilets. The options are vast, and you only have your imagination as a limit. TOC
Endless Flush Plate Designs
You can take your imagination to the next level with the vast Geberit actuator plate designs. Whether your bathroom design instills an atmosphere of fun, elegance, smoothness, or simply function, Geberit flush plates will have you covered.
In fact, this attracts toilet manufacturers to want to partner with Geberit for its in-wall carrier system, besides its impressive track record for reliability. After all, there isn’t much you can do with the ceramic bowl design other than just color and shape.
Choose the right Geberit flush plate, which will speak volumes of your refined aesthetic taste. It gives any bathroom the uplift of class and character amid the functions. It’s a designer’s secret weapon for the finishing touch of their prized bathroom design.
But that’s easier said than done. While it’s easy to choose a Geberit in-wall carrier, which you will soon find out, it’s a jungle out there if you are trying to pick a flush plate to match your bathroom design. But don’t worry, the heavy lifting is done. You will breeze in with just 5 easy steps, and the perfect flush actuator plate will appear right before your eyes.
With over 100 models of actuator plates and buttons, this post will be the longest in the history of toilet reviews. So, instead, a separate page is put up to get things organized for easy reading. But more important is to help you find the right flush plate without feeling overwhelmed.
So here you go, the entire list of Geberit flush plates for your selection. TOC
Designed For Versatility And Reliability
From here onwards, you will dive deep into the features of Geberit in-wall carrier. And you are going to love the options available to you. Yes, even if you are just replacing your regular tank and bowl toilet.
But first, relax. There aren’t many part numbers or models you need to learn or remember. There are only six Geberit in-wall carrier models here, and choosing them is super easy.
The in-wall models can be divided into 2 groups based on flushing capacity. So you can start off by deciding what flushing capacity is desirable and then choose the wall stud size, which is either 2 x 4″ or 2 x 6″ or the pre-wall installation. That’s about it.
To make it even clearer, here are all the models with their respective flushing capacities and wall stud sizes. All 6 models are without the flush plate and toilet bowl; you will need to purchase them separately.
| Sigma Concealed Tank | 1.6 / 0.8 GPF (6 / 3 LPF) | 1.28 / 0.8 GPF (4.8 / 3 LPF) |
|---|---|---|
| 2 x 4″ wall stud | Duofix Carrier Model: 111.798.00.1 | Duofix Carrier Model: 111.597.00.1 |
| 2 x 6″ wall stud | Duofix Carrier Model: 111.335.00.5 | Duofix Carrier Model: 111.902.00.5 |
| Omega Concealed Tank | 1.6 / 0.8 GPF (6 / 3 LPF) | 1.28 / 0.8 GPF (4.8 / 3 LPF) |
| 2 x 6″ wall stud | Duofix Carrier Model: 111.012.00.1 | Duofix Carrier Model: 111.018.00.1 |
Convenient, Sturdy And Corrosion Free
Robust and Rust-Free Carrier Frame
The metal frame of Geberit Duofix Carrier is a 16-gauge powder-coated steel structure. This description may seem a little daunting to a layperson. It means that the thickness of the steel is 16-gauge (1/16″ or 1.65 mm thick), and the steel surface is painted (coated) with epoxy powder, which is heated to fuse into a protective layer.
The epoxy paint will not peel nor crack and is somewhat resistant to scratches. Unless a deliberate, forceful scratch with a hard and sharp object cuts through the paint, exposing the steel, rust won’t happen. The coat is to protect the steel from rust and corrosion. In the same way, that’s how industrial machines and equipment get their coat of paint.
So, give attention and care to the paintwork during installation. If you see deep scratches on the frame surface during unboxing, return the goods and get a replacement. But don’t get paranoid over this, minor scratches or indent caused by washers or nuts is no harm done.
However, not every part of the Geberit frame is powder-coated. The friction feet are galvanized, which has a protective coat of zinc. And just like the powder coat, it is to prevent rust. Treat it the same way as the powder-coated main frame body.
The overall frame construction is sturdy and corrosion-free, lasting a lifetime. All six Duofix frames can support a maximum weight of 880 lbs (400 kg) without causing damage to the finished wall. TOC
A Conveniently Narrower Frame
One of the improvements made by Geberit to its 2×4 carrier frame is the frame width. Previously, the 111.728.00.1 carrier had a width of 23-1/4″, a typical width size for most 2×4 in-wall carrier frames you can find in the marketplace.
With a new frame (111.798.00.1), the width has shrunk to 19-3/4″. And this is the same width for all the other five models. So that gives you the advantage of better utilization of wall space. This uniformity of width removes the dilemma of deciding which stud size to use, like in the case of 111.728.00.1. That’s quite a relief when faced with a teething space constraint issue.
You can now escape from the shackle of the higher cost 2×6 wall stud when you only need a 2×4 because of the frame width. So that solves your small space problem and saves plenty of money.
No Leaks, No Rust And No Degrading Rubber
The Tank
The flushing mechanism and the tank are built to last and are maintenance-free. All parts of the flushing mechanism are of high-grade plastic. You won’t see metal parts like the ugly chain, bolt, and rod. The rubber ring and gasket are of thick premium grade, which can resist the corrosive water better than most similar products. So that takes care of all the rust, corrosion, and degrading rubber typically seen in most flush valves.
That means you have a system designed to be free of leaks since all the parts are resistant to the corrosive nature of water. Even when you need to replace the flush mechanism, it is easy to access through the flush panel. Even better, you can carry out the replacement without using any tools.
The tank is a one-piece, blow-molded plastic. There are no welded seams or weak joints to worry about hairline cracks causing leaks. According to Geberit, every tank leaving the factory has undergone a rigorous test to ensure 100% watertight. The tank is also protected with an insulating cover against condensation. TOC
Freedom To Choose Your Desired Seating Height
Comfort Height & ADA Compliance
Unlike a floor-mounted toilet, wall-hung allows you to choose the sitting height. With a Geberit in-wall carrier, you can set the seat height from 15″ to 19″ during installation.
You may think this is trivial, but not to the folks with some disability, especially to those who use a wheelchair. You can set the height to the same level as the wheelchair, so it’s easier to move over. Ask the caregivers; they will understand better and appreciate this convenience. And because of this possibility, all Geberit in-wall carriers are ADA Compliance.
But don’t get the perception that this only benefits people with disabilities. As you age, an inch difference can help ease some stress on the knees. So, this is a must-have feature if a senior is in the house. Even if you don’t need a comfort height now, you will appreciate having the adjustable height option that allows you to change the seat height later*. TOC
*Requires full access to the in-wall frame.
Peaceful And Quiet
Quiet Flush
What irks people the most in any household is none other than the embarrassing toilet flushing noise. In some extreme cases, it can deprive sleep. You can’t do much to muffle the sound, especially when you have a small bathroom with a floor-mounted tank and bowl toilet.
But when the tank and flushing mechanism are concealed behind a wall, things get a twist for the better. As the wall now acts as a sound absorber, you won’t experience the same decibel level as with the regular tank and bowl crapper. Even better with Geberit in-wall carrier where the tank is wrapped with an insulating cover, it helps reduce the noise further.
And that’s not all. The redesigned fill and flush valves are now acoustically insulated; you can now flush like nobody is in the house, even if you’ve got guests at the dining table. And to the light sleepers, it’s a lifesaver. TOC
Choosing The Right Wall-Hung Toilet Carrier
There are only two wall stud sizes: the 2×4 and 2×6 room-height walls. It can’t get any simpler than that. Either one will do the job on a standard room-height wall. Your choice of the in-wall carrier will depend on your wall design. So before you pick a Geberit in-wall carrier, you must decide which wall stud size suits your requirements with your builder.
And if you have concerns about condensation, you are better off going with the 2 x 6″ wall stud. The advantage of the 2 x 6″ stud is more air space around the tank, which will further prevent water condensation. Otherwise, the 2 x 4″ model is good enough. Both in-wall tanks are insulated against condensation, so you shouldn’t be overly concerned.
The cost difference between 111.798.00.1 (2×4) and 111.335.00.5 (2×6) Geberit Duofix Carrier is about $50 to $60. And these two are of the 1.6 / 0.8 GPF flushing capacity. The 1.28 / 0.8 GPF models’ price difference is probably the same.
The 2 x 6″ pre-wall model is a low-height carrier frame. Good for installation under a window or ledge wall or places with a limiting height. The beauty of this shorty is you can almost plant it anywhere you fancy. The flush plate can simply be installed for top or front activation by swapping the actuator position.
All six carriers offer dual flush functions with 1.6 GPF / 0.8 GPF or 1.28 / 0.8 GPF full and partial flush, respectively. However, you can opt for a single flush by choosing a single-flush flush plate, which is available for both the Sigma and Omega concealed cistern. TOC
If you are ready to buy, here are the 6 Geberit Duofix in-wall carrier models. Or read on to find out more.
Dual Flush 1.6 / 0.8 GPF (6.0 / 3.0 LPF)
Geberit 111.798.00.1 Duofix Concealed Tank Carrier
Geberit 111.335.00.5 Duofix Concealed Tank Carrier
Geberit 111.012.00.1 Duofix Carrier For Pre-Wall Construction
Dual Flush 1.28 / 0.8 GPF (4.8 / 3.0 LPF)
Geberit 111.597.00.1 Duofix Concealed Tank Carrier
Geberit 111.902.00.5 Duofix Concealed Tank Carrier
Geberit 111.018.00.1 Duofix Carrier For Pre-Wall Construction
Widest Wall Hung Toilet Bowl Options
Geberit in-wall carrier is compatible with almost every wall-hung toilet by major toilet manufacturers from Asia, Europe, and the United States. Even though some toilet manufacturers have their in-wall systems, they lack the variety of flush plates Geberit offers. That may pose a design challenge if you want a more unique appearance for the bathroom.
Geberit’s wealth of parts and accessories to meet every installation need offers you the greatest design freedom. This is why designers love to feature a Geberit wall-hung toilet in their portfolio to stand out.
The possibilities are endless with a Geberit carrier. It’s like there is an unspoken procedure in shopping for a wall-hung toilet. Decide on a Geberit in-wall carrier first before choosing the bowl. Or you will be limiting your option for flush plates and flexibility on installation.
“What if I like a toilet bowl model not in Geberit’s Compatible Bowls List?”
You can take these 4 steps to verify if the bowl suits Geberit in-wall carrier.
Step 1
The bowl must be designed to flush with 1.6 GPF (6.0 LPF) single flush or 1.6/0.8 GPF (6.0/3.0 LPF) dual-flush – similarly with 1.28 GPF (4.8 LPF) or 1.28 / 0.8 GPF (4.8 / 3.0 LPF). If you are unsure about this information, check with the toilet bowl manufacturer.
Step 2
There must be only two mounting holes on the toilet bowl. Any more than 2, no go.
Step 3
The water inlet must be at the back of the bowl. It simply means the flushing water must flow into the bowl via the back. Otherwise, no go.
Before proceeding to step 4, you must meet all the three criteria above. You can’t use a Geberit in-wall carrier if the bowl doesn’t meet any of the steps.
Step 4
Check dimensions. There are three critical dimensions you need to meet.
- Mounting dimension
- Water inlet dimension
- Waste outlet dimension
And if one or none of the dimensions matched, or you can’t figure out any of it, don’t give up. You can contact Geberit Technical Support for further assistance. The helpful tech support will guide you through with some suggestions. TOC
Compatible Wall Hung Toilet Bowl Models
With over 150 wall-hung toilet bowl models to choose from, it’ll drive you crazy to go through every single one of them. But you can narrow them down according to your preference, like MaP rating, WaterSense labeled, or their appearances. Or just go with the popular ones like TOTO, Duravit, and KOHLER.
However, the list also includes manufacturers who may not be present in the United States. Service support can be a real pain in the rear in that case. So before you land your hands on one, ensure the parts and accessories are, at least, fairly easy to get. And not at an exorbitant price simply because you can’t consider an alternative.
Here’s a list of all compatible wall-hung toilet bowl brands and models extracted from Geberit’s catalog for your easy reference.
Peace of Mind on Parts Availability
This is what Geberit says on their website:
You can install with confidence, because Geberit guarantees spare parts availability for 50 years on all replaceable parts of the concealed tank and flush actuator plate (excluding specific functions of electronic products, e.g., Hygiene Flush). – Geberit USA
Note: It is extremely difficult to guarantee electronic stuff for 50 years because electronic components degrade over time, ensuring their long-term functionality becomes challenging. Plus, new and better technology keeps emerging, making older devices obsolete.
Like your old flip phone compared to today’s smartphones – drastic change. So, guaranteeing electronics for half a century is a tall order, given the pace of change in the tech world. TOC
Are There Any Disadvantages?
The downsides of Geberit in-wall carrier are pretty generic, to say the least. Referring to the disadvantages of all in-wall carriers will be more appropriate.
Not that Geberit carrier is flawless, but it would seem nitpicking just to make a nice paragraph. So, if you are new to wall-hung toilets, here are 3 main disadvantages to your knowledge.
Fill And Flush Valve Maintenance
Unlike an external toilet tank, the only way to get to the internal parts of a concealed tank is through the actuator flush panel. You can imagine the difficulty when trying to fix a problem in the tank or just regular maintenance. You will wish your fingers have eyes.
This is why Geberit designs its flushing mechanism to be maintenance-free (Or should it be easy to maintain?). Even when you need to replace the flush or fill valve, it’s not as hard as you imagine. Watch the video below and be amazed at the tool-free access.
Treat Your Installation Like Defusing A Bomb
Though the specification says the carrier can hold up to 880 lbs, it means nothing if the wall can’t match or exceed the maximum hold-up weight of the carrier. When the frame is not properly secured with the right material, it will lead to problems later. Any negligence can have dire consequences, and you are akin to installing a time bomb. Repairs are going to be costly for sure.
If you don’t want the possibility of the bowl crashing down while you are on it, better to have a qualified person to do the installation. And preferably someone who knows wall structure to do it for you.
But where can you find this expert?
A good place to start is Amazon Home Services. They have pretty decent reviews over there. Otherwise, you may have to hire a local contractor with expertise and experience installing wall-hung toilets.
The Ground Is Real
As a matter of fact, 880 lbs is a lot of weight. But still, it is a limit as opposed to a floor-mounted crapper on solid ground. Period.
How Safe Can a Wall-Hung Toilet Be?
Did you just change your mind after learning the disadvantages of wall-hung toilets?
Please don’t. It’s not that bad, actually. Just Geberit alone has over 60 million installations worldwide, and more than 90% of toilets in Switzerland are wall hung just can’t be wrong. It is as safe as the floor-mounted water closet.
In fact, it is even safer with the tank hidden behind the wall. You get fewer obstructions or barriers, giving you more open space and accessibility. Besides looking neat, cleaning is much easier, with no hidden areas for mold, dirt, and creepy crawlies.
So stay with your plan, get a wall-hung toilet, and be sure to use a Geberit in-wall carrier. You are going to love it. TOC
Bowl On the Floor, Tank In the Wall
So you love the idea of a hidden tank but are still apprehensive about the safety of the bowl hanging on the wall. No problem. How about keeping the bowl steadfast and secured on the floor and having the tank concealed? You still get the streamlined look, and cleaning is as easy without the tank visible.
Then, you may want to consider this Geberit Sigma System for floor-mounted, back-outlet toilets. The entire in-wall setup is similar to the wall-hung system but with a floor-standing bowl. Of course, the bowl here has to be compatible with the in-wall carrier. Here is the list of compatible bowl models – see pages 8 and 9.
And because the carrier is not required to support the bowl, the wall need not necessarily be reinforced. But the drain pipe still needs to be re-adapted to the wall if you are replacing your existing floor-mounted toilet. The entire cost is probably about the same as the wall-hung setup.
Sigma Concealed Tank for Floor-Mount Toilet
In terms of installation, the Sigma concealed tank system fits with wood and steel stud construction. It includes the necessary water supply connection, along with drainage and venting. The package includes:
- A Geberit Sigma concealed tank.
- A water supply stop.
- A drainage elbow.
- Pre-installed fill and flush valves.
Remember, you’ll need a compatible floor-mount toilet bowl, bought separately, to complete the setup.
Four Models – Two Stud Size and Two Flushing Capacities
Decide on the flushing capacity first followed by the wall stud size and you are set on the desired in-wall tank model. Then take your time to choose a matching bowl from the list of floor-mounted bowl models.
Dual Flush 1.6 / 0.8 GPF (6.0 / 3.0 LPF)
| Model No. | Wall Stud Size | Contact |
|---|---|---|
| 109.304.00.5 | 2×6 | Geberit USA |
| 109.797.00.1 | 2×4 | Geberit USA |
Dual Flush 1.28 / 0.8 GPF (4.8 / 3.0 LPF)
| Model No. | Wall Stud Size | Contact |
|---|---|---|
| 109.307.00.5 | 2×6 | Geberit USA |
| 109.781.00.1 | 2×4 | Geberit USA |
The major online stores weren’t offering them when this post was updated.
Contact Geberit USA directly if you want to purchase any concealed tank systems for floor-mounted bowls. They should be able to advise on authorized dealers or alternative purchasing avenues. TOC
Disadvantages of the Floor-Mounted System
With wall-hung toilet bowls, you can adjust the bowl height anywhere between 15 to 19 inches. This range allows for personalized comfort and can accommodate different user needs. In contrast, the height options are more restricted when you opt for a floor-mounted toilet bowl.
Among approximately 16 models, the height is fixed and only varies slightly, ranging from 15-3/16″ to 16-15/16″. This limited height range might not cater to everyone’s comfort or accessibility requirements.
Moreover, when comparing the variety of models available, floor-mounted toilets have a significantly narrower selection. With around 16 models to choose from, they pale compared to the wall-hung system, which boasts about 150 different bowl models. This disparity highlights a clear advantage in design and functional choices with wall-hung systems.
Cleaning around the base of a floor-mounted toilet also presents a different challenge compared to wall-hung toilets. With floor-mounted models, you need to clean around the bowl base, which can sometimes be awkward due to its fixed position and the way it meets the floor.
In contrast, wall-hung toilets offer a no-barrier floor design. This design makes cleaning easier, as there’s no base on the floor to work around, providing a more seamless and hygienic option. TOC
How To Check Floor-Mounted Toilet Bowl Compatibility?
A surefire way is to get one of the floor-standing toilet bowl models from the compatible bowl list. But again, if you are going for one that’s out of the list, here are the steps to confirm if it can fit on a Geberit in-wall carrier.
Since there is no need for bowl support, there is no concern for mounting holes. So, just three steps here.
Step 1
Check that the bowl is designed to flush with 1.6 GPF (6.0 LPF) single flush or 1.6/0.8 GPF (6.0/3.0 LPF) dual flush. You can easily obtain this information from the product catalog or check with the toilet bowl manufacturer.
Step 2
Water must flow into the bowl via the inlet at the back. You can’t use a Geberit in-wall carrier or the Monolith if the water inlet is at the top.
Before you proceed to Step 3, make sure you comply with Steps 1 and 2. Otherwise, the bowl is incompatible with the Geberit in-wall carrier or the Geberit Monolith.
Step 3a
Check the water inlet and waste outlet arrangement. The water supply inlet should be located above the waste outlet. Measure the center of the water inlet and the waste outlet.
Step 3b
Check the diameter of the water supply inlet and compare it with Geberit’s recommended dimensions.
Step 3c
Check the waste outlet diameter and compare it with Geberit’s recommended dimensions.
Finally, contact Geberit Technical Support and provide them the information you obtain through Step 3. Geberit’s technical support staff should be able to advise you if the bowl is a good fit for their in-wall carriers. TOC
Compatible Floor-Mount Toilet Bowl Models
This is a short list with only 6 manufacturers and about 16 models.
- Duravit
- Catalano
- Devon & Devon
- Laufen
- Neo-Metro
- Villeroy & Boch
Here’s the complete list of compatible floor-mount toilet bowl brands and models extracted from the Geberit catalog.
Summary
If you intend to install a wall-hung toilet, the drain pipe installation is the main thing you need to get over. This is why, in most cases, it is easier to implement from scratch when everything is still on the drawing board.
The other consideration that bothers many people is space limitation. A wall-hung toilet will always be the best option if that is the case. You can save significant front-to-back inches; the sides are easier with Geberit’s narrower frame size. Just 19-3/4″ wide gives you more freedom to better plan your bathroom layout without incurring unnecessary costs.
Whether you set it against the wall or fill a corner space, Geberit has all the parts and hardware for your smooth implementation. And with the vast variety of flush plates and bowls, your bathroom will look and work as desired.
