A rear outlet toilet sends waste through a wall connection, which can suit bathrooms where a floor outlet is impractical. My best overall pick is the Simple Project 19-Inch Tall Rear-Discharge Dual-Flush Toilet for its raised seat height and dual-flush setup. The WinZo One-Piece stands out for buyers who prefer an integrated design, while the MaceratingFlo 18-Inch Comfort Height offers a more conventional two-piece format and a stated 1.28 GPF flush. The main tradeoffs are wall rough-in compatibility, seat height, toilet footprint, and how much extra complexity you want from features such as bidet functions. Read on for the full comparison, buying advice, and answers to common fit questions.
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Key Takeaways
- Rough-in fit comes first: These models use rear discharge, but their stated rough-in details vary, so confirm the wall outlet position and connection before choosing a style or height.
- Raised seating is a recurring strength: Several Simple Project and SUPERFLO options are 19 inches tall, while the MaceratingFlo and Vomlor listings specify 18-inch seating.
- Dual flush is not universal: It appears on several tall models, while other options emphasize a one-piece build, a soft-close seat, or bidet features.
- Two-piece models give buyers more familiar configurations: They include several MaceratingFlo choices and the compact option, while the WinZo square-bowl model is a one-piece alternative.
- The lineup has repeated and underspecified listings: SUPERFLO appears twice with the same supplied name, so the available details do not support treating those entries as distinct choices; verify dimensions and included parts with the seller.
| Simple Project 19-Inch Tall Rear-Discharge Dual-Flush Toilet |  | Best for a Taller Bowl | Model: HT-120-2 | Bowl height: 19 inches | Outlet type: Rear discharge | VIEW ON AMAZON | See Our Full Breakdown |
| WinZo Rear-Outlet One-Piece Toilet with Square Bowl and Dual Flush |  | Best for a Low-Volume Half Flush | Model: WZ5070P | Type: One-piece toilet | Outlet: Rear outlet / back-wall discharge | VIEW ON AMAZON | See Our Full Breakdown |
| MaceratingFlo Rear-Outlet Two-Piece Toilet with Tank, Elongated Bowl, 18-Inch Comfort Height, 1.28 GPF |  | Best for a Specified Rough-In | Model: MF00R8-A | Type: Two-piece rear-outlet toilet | Bowl shape: Elongated | VIEW ON AMAZON | See Our Full Breakdown |
| WinZo Rear-Outlet Smart Toilet with Bidet |  | Best Smart Feature Set | Model: SM8004NP-1 | Dimensions: 26.8 x 16 x 20 inches | Weight: 88 pounds | VIEW ON AMAZON | See Our Full Breakdown |
| Simple Project 19-Inch ADA-Height Rear-Discharge Toilet |  | Best for Mobility-Focused Households | Model: HT-120 | Bowl height: 19 inches | Drain type: Rear discharge, P-trap | VIEW ON AMAZON | See Our Full Breakdown |
| SUPERFLO 19-Inch Tall Rear-Outlet Toilet with Dual Flush |  | Best for Low-Water Dual Flushing | Bowl height: 19 inches | Drain type: Rear discharge | Trap design: P-trap | VIEW ON AMAZON | See Our Full Breakdown |
| SUPERFLO 19-Inch Tall Rear-Outlet Toilet with Dual Flush |  | Best for Buyers Wanting a Higher-Volume Full Flush | Brand: SUPERFLO | Model: H120 | Toilet type: Two-piece, round, rear-discharge | VIEW ON AMAZON | See Our Full Breakdown |
| Simple Project 19-Inch Rear-Outlet Toilet with Tank and Soft-Close Seat |  | Best for Clearly Specified Drain Height | Brand: Simple Project | Model: HT-120-2 | Outlet type: Rear outlet | VIEW ON AMAZON | See Our Full Breakdown |
| Vomlor 18-Inch ADA Elongated Rear-Outlet Toilet, 1.28 GPF, White |  | Best Elongated Single-Flush Pick | Material: Vitreous china | Color: White | Toilet type: Two-piece, single flush, rear discharge | VIEW ON AMAZON | See Our Full Breakdown |
| Maceratingflo Two-Piece Rear-Outlet Toilet with 7-Inch Rough-In and Soft-Close Seat |  | Best for a 7-Inch Rough-In | Brand: Maceratingflo | Model: MF000T05-A | Type: Two-piece, rear-outlet toilet | VIEW ON AMAZON | See Our Full Breakdown |
| Compact Two-Piece Rear-Outlet Toilet with Soft-Close Seat |  | Best for Narrow Bathrooms | Type: Two-piece toilet | Outlet: Rear outlet, P-trap | Rough-in: 7 inches | VIEW ON AMAZON | See Our Full Breakdown |
| rear outlet toilet | Model | Seat | Included components |
|---|---|---|---|
| Simple Project 19-Inch Tall Re | HT-120-2 | Soft-close | Curved pipe, extension pipe, seat, water parts, water tank, round bowl |
| WinZo Rear-Outlet One-Piece To | WZ5070P | UF soft-close with quick-release system | — |
| MaceratingFlo Rear-Outlet Two- | MF00R8-A | — | — |
| WinZo Rear-Outlet Smart Toilet | SM8004NP-1 | — | Angle valve, fixing bolts, wax ring, remote, smart toilet with bidet seat |
| Simple Project 19-Inch ADA-Hei | HT-120 | Slow-close | Toilet bowl, water tank, extension pipe, installation accessories, installation instructions |
| SUPERFLO 19-Inch Tall Rear-Out | — | Soft-close | — |
| SUPERFLO 19-Inch Tall Rear-Out | H120 | Soft-close | Rear drain connection tube, toilet bowl, toilet tank |
| Simple Project 19-Inch Rear-Ou | HT-120-2 | Soft-close | Toilet bowl, extension tubes, soft-close seat, water tank |
| Vomlor 18-Inch ADA Elongated R | — | — | — |
| Maceratingflo Two-Piece Rear-O | MF000T05-A | 17.6-inch elongated soft-close | Toilet seat, installation kits, tank, bowl, flexible and hard extension pipes |
| Compact Two-Piece Rear-Outlet | — | Soft-close | — |
More Details on Our Top Picks
Simple Project 19-Inch Tall Rear-Discharge Dual-Flush Toilet
The 19-inch bowl is the main reason to choose this Simple Project model: it may make sitting down and standing up easier for taller adults and people with limited mobility. Its 1.6/1 GPF dual flush gives buyers a lower-volume option, though the half flush uses more water than the WinZo WZ5070P’s 0.8 GPF setting. A soft-close seat and included extension pipe and installation parts make the package more complete than the WinZo, which lists fixing bolts but fewer installation pieces. The tradeoff is fit: the rear outlet center sits 7.5 inches above the floor, so buyers need to compare that measurement with their wall connection before ordering. Choose it for the taller bowl; skip it if the outlet height does not match your plumbing.
Pros:- 19-inch bowl may ease sitting and standing
- Dual flush offers 1 GPF half-flush option
- Soft-close seat reduces lid noise
- Includes an extension pipe and installation components
Cons:- Outlet-center height must match the existing wall connection
- Half flush uses more water than the WinZo WZ5070P’s 0.8 GPF option
Best for: Taller adults and people who want a higher seat with a lower-volume flush option
Not ideal for: Households with rear-wall plumbing that does not align with the 7.5-inch outlet center
- Model:HT-120-2
- Bowl height:19 inches
- Outlet type:Rear discharge
- Rear outlet center:7.5 inches from floor
- Full flush:1.6 GPF
- Half flush:1 GPF
- Seat:Soft-close
- Included components:Curved pipe, extension pipe, seat, water parts, water tank, round bowl
Our verdict“Choose this Simple Project model if a 19-inch bowl is your priority and your rear-wall outlet matches its 7.5-inch center height.”
WinZo Rear-Outlet One-Piece Toilet with Square Bowl and Dual Flush
The WinZo WZ5070P stands out for its 0.8 GPF half flush, the lowest stated partial-flush volume among these five picks. That makes it a stronger fit for buyers focused on reducing water use than the Simple Project HT-120-2, whose half flush is 1 GPF. The 17-inch seat height is also lower than the Simple Project models’ 19-inch bowls, which may suit people who find a taller seat awkward. Its one-piece form and elongated rectangular bowl give it a distinct profile, while the quick-release, soft-close seat can make routine cleaning simpler. The tradeoff is plumbing specificity: the rear outlet must meet a compatible back-wall connection, and the listed package includes fewer installation parts than the MaceratingFlo MF00R8-A. Check the connection and included hardware before choosing it.
Pros:- 0.8 GPF half flush is the lowest stated partial-flush volume in this group
- 17-inch seat height suits buyers who prefer a lower seat than 19-inch models
- One-piece design with elongated rectangular bowl
- Quick-release, soft-close seat supports easier cleaning
Cons:- Requires a compatible back-wall outlet connection
- Included components list is limited to the toilet, seat, and fixing bolts
Best for: Water-conscious households with compatible back-wall plumbing that prefer a 17-inch seat
Not ideal for: Buyers seeking a 19-inch bowl or a toilet package with extension pipes and broader installation components
- Model:WZ5070P
- Type:One-piece toilet
- Outlet:Rear outlet / back-wall discharge
- Flush:Dual flush
- Full flush:1.6 GPF
- Half flush:0.8 GPF
- Seat height:17 inches
- Bowl shape:Rectangular, elongated
- Seat:UF soft-close with quick-release system
Our verdict“Pick the WinZo WZ5070P if its 17-inch seat and 0.8 GPF half flush suit you and your wall connection is compatible.”
MaceratingFlo Rear-Outlet Two-Piece Toilet with Tank, Elongated Bowl, 18-Inch Comfort Height, 1.28 GPF
The MaceratingFlo MF00R8-A is the most clearly specified choice for buyers who need to plan around a 7-inch rough-in: it names a P-trap and includes both rigid and flexible extension pipes. Those details make the installation package more informative than the WinZo WZ5070P listing, though neither removes the need to match the toilet to the actual wall connection. Its 18-inch elongated bowl sits between the WinZo’s 17-inch seat and the Simple Project models’ 19-inch bowls, a useful middle ground for buyers who want a raised seat without going as tall. The skirted ceramic exterior can simplify wiping, and its 1.28 GPF flush uses less water per flush than the 1.6 GPF full-flush settings on both dual-flush models. It is a two-piece unit with a two-year limited warranty, so buyers wanting one-piece construction or a longer stated warranty should look elsewhere.
Pros:- Specifies a 7-inch rough-in and P-trap
- Includes rigid and flexible extension pipes
- 18-inch elongated bowl offers a middle height between 17- and 19-inch options
- 1.28 GPF flush and skirted ceramic exterior
Cons:- Rear outlet and rough-in must match the existing plumbing
- Two-piece construction has a tank-to-bowl seam to clean
- Warranty is limited to two years
Best for: Renovators who need a stated 7-inch rough-in, P-trap, and included extension pipes
Not ideal for: Buyers whose wall-drain setup does not match the specified rough-in or who want a one-piece toilet
- Model:MF00R8-A
- Type:Two-piece rear-outlet toilet
- Bowl shape:Elongated
- Height:18 inches
- Flush rate:1.28 GPF
- Rough-in:7 inches
- Trap type:P-trap
- Material:Ceramic
- Warranty:2-year limited
Our verdict“Choose the MaceratingFlo MF00R8-A when its 7-inch rough-in matches your wall plumbing and you want an 18-inch bowl with installation pipes included.”
WinZo Rear-Outlet Smart Toilet with Bidet
This WinZo is the feature-rich pick for buyers who want a rear-outlet toilet with bidet functions in one fixture. Adjustable warm-water washes, air drying, a heated seat, night light, and self-cleaning nozzles make it far more convenience-focused than the MaceratingFlo MF00R8-A, which sticks to a conventional 1.28 GPF flush and standard seat. Foot-kick and automatic flushing add hands-free operation, while a remote controls the smart functions. That breadth comes with a substantial installation tradeoff: the listing describes it as wall mounted and intended for compatible wall plumbing, so it is a poor match for buyers expecting a straightforward replacement for a floor-outlet toilet. At 88 pounds and 26.8 inches deep, it also calls for careful planning around handling and bathroom space. Choose it for integrated bidet and automated features only after confirming the mounting and plumbing arrangement.
Pros:- Rear outlet is designed for wall-mounted plumbing setups
- Foot-kick and automatic flushing provide hands-free options
- Includes adjustable warm-water bidet wash and warm-air drying
- Heated seat, night light, and self-cleaning nozzles add convenience
Cons:- Requires a compatible wall-mounted plumbing setup
- 88-pound weight and 26.8-inch depth require space and handling planning
- Smart controls and functions add complexity compared with basic rear-outlet models
Best for: Homeowners with compatible wall plumbing who want an integrated bidet, heated seat, and hands-free flushing
Not ideal for: Buyers replacing a standard floor-outlet toilet or seeking a basic fixture with simple installation
- Model:SM8004NP-1
- Dimensions:26.8 x 16 x 20 inches
- Weight:88 pounds
- Material:Porcelain
- Seat material:Polypropylene (PP)
- Installation:Wall mounted
- Shape:Oval
- Flush features:Siphonic jet; touch-free foot-kick or automatic flushing
- Included components:Angle valve, fixing bolts, wax ring, remote, smart toilet with bidet seat
Our verdict“Select this WinZo if you have the required wall plumbing and want bidet and hands-free features built into your rear-outlet toilet.”
Simple Project 19-Inch ADA-Height Rear-Discharge Toilet
With a 19-inch bowl and a dual-flush system rated at 1.28/0.8 GPF, this Simple Project model pairs an elevated sitting position with a lower-volume option. It is more water-conscious on both listed flush settings than the HT-120-2, whose full and half flushes are 1.6 and 1 GPF. Compared with the MaceratingFlo MF00R8-A’s 18-inch bowl and single 1.28 GPF flush, this model gives mobility-focused households a taller bowl and a separate partial-flush option. The listing describes a P-trap for rear or wall-drain installations and includes an extension pipe and installation accessories. However, rear-discharge compatibility still depends on the actual plumbing, and some installations may need a macerator pump. Buyers should confirm that requirement and the outlet connection before selecting it.
Pros:- 19-inch bowl may ease sitting and standing
- Dual flush offers 1.28 GPF full and 0.8 GPF half options
- Slow-close seat reduces noise
- Includes extension pipe and installation accessories
Cons:- Rear-discharge plumbing may not match existing connections
- A macerator pump may be needed for some installations
Best for: Seniors and people with limited mobility who want a 19-inch bowl and dual-flush control
Not ideal for: Buyers whose plumbing does not suit the rear P-trap or who need a confirmed pump-free installation
- Model:HT-120
- Bowl height:19 inches
- Drain type:Rear discharge, P-trap
- Flush type:Dual flush
- Full flush:1.28 GPF
- Half flush:0.8 GPF
- Seat:Slow-close
- Included components:Toilet bowl, water tank, extension pipe, installation accessories, installation instructions
Our verdict“Choose this Simple Project model if mobility support and a lower-volume dual flush matter and your installer confirms the rear-drain setup.”
SUPERFLO 19-Inch Tall Rear-Outlet Toilet with Dual Flush
The standout here is its 0.8 GPF half flush, which uses less water than the 1.6 GPF full flush on the other SUPERFLO 19-Inch Tall Rear-Outlet Toilet. Its 19-inch bowl may also suit buyers who prefer a higher seat, while the soft-close seat and seamless base address everyday noise and cleanup. The tradeoff is that the listed 1.28 GPF full flush differs from the other SUPERFLO’s 1.6 GPF option, so buyers should compare flush needs and confirm the exact model details before choosing. Both share the rear-discharge layout, which only works when the bathroom plumbing matches. A P-trap design supports wall-drain installations, but some setups may still require a macerator pump.
Pros:- 0.8 GPF half flush provides a lower-water option
- 19-inch bowl height may make sitting and standing easier
- Soft-close seat reduces lid noise
- Seamless base is designed to simplify cleaning
Cons:- Rear-discharge plumbing limits where it can be installed
- A macerator pump may be required for some applications
- Its 1.28 GPF full flush differs from the comparable SUPERFLO model’s 1.6 GPF specification
Best for: Households with compatible rear-drain plumbing that want a tall bowl and a low-water half-flush option.
Not ideal for: Buyers whose bathroom has a floor outlet or who need a toilet guaranteed to work without a macerator pump.
- Bowl height:19 inches
- Drain type:Rear discharge
- Trap design:P-trap
- Full flush:1.28 GPF
- Half flush:0.8 GPF
- Seat:Soft-close
Our verdict“Choose this SUPERFLO if your wall drain matches and a 0.8 GPF half flush matters more to you than a higher-volume full-flush option.”
SUPERFLO 19-Inch Tall Rear-Outlet Toilet with Dual Flush
This version pairs a 1.6 GPF full flush with a 0.8 GPF half flush, giving buyers a higher-volume option than the other SUPERFLO 19-Inch Tall Rear-Outlet Toilet’s 1.28 GPF full flush. Its 18.7-inch bowl is close to the 19-inch height of that model, so the flush choice is the clearer distinction between the two. The round bowl can suit bathrooms where an elongated profile would be awkward, though the listing provides no overall dimensions to confirm the space it needs. A soft-close seat and smooth base offer practical finishing touches. Since this is a rear-discharge, two-piece toilet, check the drain position and installation dimensions before buying; the included rear drain connection tube does not make mismatched plumbing compatible.
Pros:- 1.6 GPF full flush offers a higher-volume option than the 1.28 GPF SUPERFLO model
- 0.8 GPF half flush provides a lower-water alternative
- 18.7-inch bowl height can make sitting and standing easier
- Includes a rear drain connection tube and soft-close seat
Cons:- Rear drain must match the bathroom plumbing
- Installation dimensions need checking before purchase
- Round bowl may offer less seating area than an elongated design
Best for: Buyers with a compatible wall drain who want a tall round toilet and a 1.6 GPF full-flush option.
Not ideal for: Shoppers who need a compact fit verified by full dimensions or whose existing toilet connects to a floor drain.
- Brand:SUPERFLO
- Model:H120
- Toilet type:Two-piece, round, rear-discharge
- Bowl height:18.7 inches
- Full flush volume:1.6 GPF
- Half flush volume:0.8 GPF
- Seat:Soft-close
- Included components:Rear drain connection tube, toilet bowl, toilet tank
Our verdict“Pick this model over the other SUPERFLO when you want its 1.6 GPF full flush and can confirm the rear-drain fit.”
Simple Project 19-Inch Rear-Outlet Toilet with Tank and Soft-Close Seat
Among these rear-outlet choices, this Simple Project makes one fit detail explicit: its listed drain center sits 7.5 inches above the floor. That gives remodelers a concrete measurement to compare with their wall connection, unlike the SUPERFLO models, whose supplied specs do not state a drain height. The 19-inch height, soft-close seat, tank, and extension tubes make this a fairly complete package for a compatible installation. There is a real documentation snag, though: the dual-flush rates conflict, with the description listing 1/1.28 GPF and an item highlight listing 1/1.6 GPF. I would confirm the flush figures before buying. Like the other rear-discharge toilets here, its P-trap layout requires matching plumbing; the stated drain measurement does not resolve every fit question.
Pros:- Lists a 7.5-inch floor-to-drain-center measurement for fit checks
- 19-inch height may suit buyers seeking a taller toilet
- Includes extension tubes, tank, bowl, and soft-close seat
- Dual-flush system offers two flush options
Cons:- Listing gives conflicting dual-flush specifications
- Rear-drain height must match the installation
- Rear outlet limits compatibility with floor-drain plumbing
Best for: Remodelers who can measure their wall drain and want a listed drain-center height plus included extension tubes.
Not ideal for: Buyers who need confirmed flush volumes or cannot match a 7.5-inch drain center to their plumbing.
- Brand:Simple Project
- Model:HT-120-2
- Outlet type:Rear outlet
- Toilet height:19 inches
- Drain height:7.5 inches from floor to drain center
- Flush system:Dual flush; listing conflicts between 1/1.28 GPF and 1/1.6 GPF
- Seat:Soft-close
- Included components:Toilet bowl, extension tubes, soft-close seat, water tank
Our verdict“Consider this Simple Project when its 7.5-inch drain-center measurement matches your bathroom, and verify the flush rates with the seller.”
Vomlor 18-Inch ADA Elongated Rear-Outlet Toilet, 1.28 GPF, White
The Vomlor is the clearest fit for buyers who prefer an elongated bowl and a single-flush setup. Its 1.28 GPF siphon flush differs from the dual-flush SUPERFLO and Simple Project models, which offer a lower-water half-flush choice; in exchange, this listing gives one flush rate rather than competing figures. The 17.75-inch seat height and soft-close seat support easier sitting and quieter closing, while vitreous china is described as stain-resistant. It also includes an extension pipe and installation hardware. The tradeoff is that the bowl height is listed at 17 inches, shorter than the 19-inch options in this roundup. Rear discharge still narrows installation compatibility, and some applications may need a macerator pump that is not included.
Pros:- Elongated soft-close seat offers a different seating profile from round-bowl options
- 17.75-inch seat height may ease sitting and standing
- 1.28 GPF siphon flush has a clearly stated rate
- Includes extension pipe, wax ring, and mounting screws
Cons:- 17-inch bowl is shorter than the 19-inch options in this roundup
- Single flush lacks a lower-water half-flush choice
- Macerator pump may be needed for some installations and is not included
Best for: Buyers with a compatible rear drain who prefer an elongated bowl, one stated flush rate, and included installation hardware.
Not ideal for: Shoppers seeking a 19-inch bowl or dual-flush control, or anyone whose setup requires a pump they do not plan to add.
- Material:Vitreous china
- Color:White
- Toilet type:Two-piece, single flush, rear discharge
- Bowl shape:Elongated
- Flush rate:1.28 GPF
- Bowl height:17 inches
- Seat height:17.75 inches
- Dimensions:28.75 x 16.33 x 30.31 inches (D x W x H)
- Weight:78 lb
Our verdict“Choose the Vomlor if you want an elongated rear-outlet toilet with a stated 1.28 GPF flush and your plumbing does not require an added pump.”
Maceratingflo Two-Piece Rear-Outlet Toilet with 7-Inch Rough-In and Soft-Close Seat
This Maceratingflo gives buyers an unusually specific fit point: a 7-inch rough-in and 3-inch outlet. That makes it a candidate for a bathroom built around those measurements, while the Vomlor listing supplies overall dimensions and bowl height but no rough-in figure. Its 1.28 GPF tornado flush and 17.6-inch elongated soft-close seat make the package practical on paper, and flexible and hard extension pipes provide two connection options. Those extras do not remove the need to check the wall drain and rough-in against the actual installation. Compared with the dual-flush SUPERFLO models, it has no stated half-flush mode, so there is less choice over water use. The 7-inch rough-in is also a constraint: buyers with different plumbing dimensions should look elsewhere.
Pros:- Specified 7-inch rough-in helps buyers check a key fit measurement
- 1.28 GPF tornado flush rate is stated
- Includes flexible and hard extension pipes
- Elongated 17.6-inch soft-close seat is included
Cons:- 7-inch rough-in may rule it out for many existing installations
- No half-flush option is specified
- Rear outlet still requires compatible wall plumbing
Best for: Renovators whose existing rear-outlet setup matches a 7-inch rough-in and 3-inch outlet.
Not ideal for: Buyers with a different rough-in measurement or those who want a dual-flush half-flush option.
- Brand:Maceratingflo
- Model:MF000T05-A
- Type:Two-piece, rear-outlet toilet
- Rough-in:7 inches
- Outlet diameter:3 inches
- Flush rate:1.28 GPF
- Seat:17.6-inch elongated soft-close
- Included components:Toilet seat, installation kits, tank, bowl, flexible and hard extension pipes
- Warranty:1-year replacement and 2-year repair
Our verdict“Choose this Maceratingflo only after confirming your installation matches its 7-inch rough-in and 3-inch outlet.”
Compact Two-Piece Rear-Outlet Toilet with Soft-Close Seat
Space-saving fit is this toilet’s clearest advantage in a roundup with several taller models. At 16.5 inches high, it offers a lower profile than the 18-inch MaceratingFlo elongated toilet, which may suit bathrooms where extra height is not the priority. Its 7-inch rough-in and rear P-trap outlet make fit checks especially important; the included extension pipes offer installation options, but they do not make every existing drain compatible. The soft-close seat reduces abrupt noise, while the glazed surface is intended to make routine cleaning easier. An efficient flush may help limit water use, though the supplied details do not specify a flush volume. I’d choose it for a tight room where compact dimensions matter more than comfort height; buyers seeking a taller seat should compare the MaceratingFlo or ADA-height options instead.
Pros:- Compact design is suited to narrow bathroom spaces.
- Soft-close seat reduces lid and seat noise.
- Efficient flush is designed to use less water.
- Glazed surface is intended to simplify cleaning.
Cons:- The 16.5-inch height is lower than the comfort-height alternatives in the roundup.
- The 7-inch rough-in and rear P-trap configuration may not match existing plumbing.
- Installation may require selecting and fitting one of the included extension pipes.
Best for: Homeowners fitting a rear-outlet toilet into a narrow bathroom who prefer a lower seat and have confirmed a 7-inch rough-in will work.
Not ideal for: Buyers who need an 18- or 19-inch comfort-height seat, or anyone whose existing drain layout has not been checked for rear-outlet compatibility.
- Type:Two-piece toilet
- Outlet:Rear outlet, P-trap
- Rough-in:7 inches
- Height:16.5 inches
- Seat:Soft-close
- Finish:White glazed surface
- Installation:Includes two types of extension pipes
Our verdict“Choose this compact model when bathroom space and a lower profile matter more than the taller seating offered by the MaceratingFlo and ADA-height alternatives.”
How We Picked
I ranked these rear outlet toilets by how clearly their stated features answer common buyer needs: matching a wall outlet, choosing a comfortable height, managing water use, and selecting a configuration that fits the bathroom and maintenance preferences. I gave more weight to listings with useful specifics such as a stated rough-in, flush rate, bowl shape, or seat feature; a headline alone cannot establish installation compatibility or flush performance.
The Simple Project 19-inch dual-flush leads because its combination of raised seating and two flush choices gives it broad practical appeal. Other models rank by distinct needs: the one-piece WinZo for an integrated form, the bidet-equipped WinZo for added functions, and compact or ADA-height options for more specific space and access priorities. Where the supplied names repeat or omit important measurements, I treat that uncertainty as a drawback rather than assuming differences the listing does not establish.
| rear outlet toilet | Included components |
|---|---|
| Simple Project 19-Inch Tall Re | Curved pipe, extension pipe, seat, water parts, water tank, round bowl |
| WinZo Rear-Outlet One-Piece To | — |
| MaceratingFlo Rear-Outlet Two- | — |
| WinZo Rear-Outlet Smart Toilet | Angle valve, fixing bolts, wax ring, remote, smart toilet with bidet seat |
| Simple Project 19-Inch ADA-Hei | Toilet bowl, water tank, extension pipe, installation accessories, installation instructions |
| SUPERFLO 19-Inch Tall Rear-Out | — |
| SUPERFLO 19-Inch Tall Rear-Out | Rear drain connection tube, toilet bowl, toilet tank |
| Simple Project 19-Inch Rear-Ou | Toilet bowl, extension tubes, soft-close seat, water tank |
| Vomlor 18-Inch ADA Elongated R | — |
| Maceratingflo Two-Piece Rear-O | Toilet seat, installation kits, tank, bowl, flexible and hard extension pipes |
| Compact Two-Piece Rear-Outlet | — |
Factors to Consider When Choosing Rear Outlet Toilet
Rear outlet models narrow your choices around the plumbing connection, but the right purchase still depends on the room, the people using it, and the work needed to install it. I would settle the wall connection and clearances before comparing convenience features.
Match the Wall Rough-In Before Choosing a Toilet
Measure from the finished wall to the center of the waste outlet, then compare that measurement with the toilet’s installation specifications. A model described as rear outlet may still require a particular outlet height or connection arrangement. The MaceratingFlo listing that names a 7-inch rough-in provides a useful starting point, but that figure should be checked against the product manual and your actual plumbing. Account for wall finishes, trim, and any offset fittings, since each can affect the usable measurement. If the listing does not give a rough-in dimension, request the specification before ordering. A mismatch can turn an otherwise suitable toilet into a plumbing alteration project.
Choose Seat Height for the People Who Use It
Seat height affects how easily someone can sit down and stand up, so compare the complete seat height rather than relying only on a label such as comfort height or ADA height. The roundup includes models described as 19-inch tall and others listed at 18 inches, but the measurement conventions may differ. Check whether the stated height includes the seat and compare it with the current toilet if that one feels comfortable. A taller bowl can help some adults while feeling awkward for shorter users or children. Household needs matter more than selecting the tallest option by default. For accessibility planning, check local requirements and the full specification rather than treating an ADA-related product name as proof of compliance.
Look Beyond the Flush Label
A dual-flush control offers a choice between flush volumes, which can be useful when the toilet is used often and water use matters. A stated rate such as 1.28 GPF gives a comparison point, but it does not by itself tell you how well a toilet clears waste. Look for complete manufacturer specifications on flush performance, trapway, and installation requirements. A rear outlet can also depend on the building’s drain layout, so confirm that the model is approved for the intended plumbing arrangement. Do not assume that two products with the same flush label perform identically. When the listing gives little technical detail, the manual or manufacturer support can fill a meaningful gap.
Measure the Room and Service Clearance
Measure the distance from the wall to the front of the bowl, the width available beside it, and the clearance around the seat. A compact model may help in a tight room, but compact dimensions should be checked against the bowl shape and sitting comfort. One-piece construction can reduce seams between tank and bowl, while a two-piece toilet may be easier to handle in separate parts during installation. Either type still needs access to its shutoff valve and serviceable components. Check the tank depth, lid clearance, and door swing as well as the footprint. Product names alone rarely provide enough detail to confirm a tight fit.
Compare Included Parts and Ongoing Maintenance
Confirm whether the box includes the seat, mounting hardware, and any adapters needed for the rear connection. A soft-close seat is a convenience feature, but it does not confirm that the seat is easy to replace or that compatible parts will remain available. Bidet functions add controls and connections that may require a nearby power outlet or additional plumbing, depending on the model. Ask how the toilet is serviced and whether common parts can be purchased separately. A simpler two-piece setup may suit buyers who value familiar repairs, while a one-piece or smart model may appeal to those who prioritize integrated features. Check the warranty and installation instructions before deciding which tradeoff fits your household.
Frequently Asked Questions
How can I tell whether a rear outlet toilet will fit my existing wall drain?
Measure from the finished wall to the drain center and record the outlet height, then compare both with the model’s installation drawing. Check whether the required dimension refers to the finished wall or the framing, since that difference can affect fit. The MaceratingFlo model in this roundup names a 7-inch rough-in, but the other listings may need separate confirmation. If measurements or connection details are missing, ask the seller or manufacturer for the manual before purchasing. A plumber can confirm whether the existing connection can be reused.
Does a 19-inch toilet seat height suit every adult?
No. A taller seat may make sitting and standing easier for some adults, but it can feel too high for shorter users or children. This roundup includes multiple 19-inch models and options described at 18 inches, so compare the actual seat-top measurement with a toilet that feels comfortable. Verify whether the published height includes the seat. If several household members use the bathroom, prioritize a height that works for the group rather than choosing by the largest number.
Should I choose a dual-flush model or one listed at 1.28 GPF?
Those labels describe different things: dual flush gives users a choice of flush volume, while 1.28 GPF states a flush volume for the model. Several tall toilets here are described as dual flush, and a MaceratingFlo option specifies 1.28 GPF. Compare the manufacturer’s full performance data and local plumbing requirements before deciding. Flush volume alone does not establish how effectively a toilet clears the bowl. If the listing omits performance details, ask for the technical sheet rather than inferring them from the label.
Is a one-piece rear outlet toilet worth choosing over a two-piece model?
A one-piece design may appeal if you prefer an integrated look and fewer tank-to-bowl seams to clean. A two-piece model may be easier to move into a bathroom in separate parts and may feel more familiar to service. In this roundup, the WinZo square-bowl toilet is presented as one piece, while several MaceratingFlo options use a two-piece format. Neither format guarantees an easier installation, since the wall connection and room access still matter. Check total dimensions, lifting needs, repair information, and included parts before choosing.
What should I check before buying a smart rear outlet toilet with a bidet?
First confirm that the rear outlet dimensions match your plumbing, then check whether the bidet functions need an electrical outlet and what water connections the installation requires. Review the manual for clearance around controls, cleaning instructions, and service access. The WinZo smart option is the standout here for buyers seeking bidet features, but the supplied product name does not establish its exact functions or installation needs. Ask for the specification sheet and confirm compatible replacement parts. If you want a simpler setup, a conventional dual-flush or soft-close model may involve fewer added connections.
Conclusion
For most buyers who want raised seating with a choice of flush, I would start with the Simple Project 19-Inch Tall Rear-Discharge Dual-Flush Toilet as the best overall pick. The Simple Project 19-Inch Rear-Outlet Toilet with Tank and Soft-Close Seat is the value-oriented choice if you prefer a straightforward setup and confirm the listing includes the parts you need. For a more integrated look, consider the WinZo One-Piece; for added bidet functions, the WinZo Smart Toilet is the premium-feature choice, subject to checking power and connection requirements. Beginners may find a conventional two-piece model easier to understand and service, while buyers with limited space should compare the compact option’s full dimensions before deciding. In every case, match the wall rough-in first, then choose height and features around the people using the bathroom.
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