Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.7 Best Back Outlet Toilet | Stop Scrubbing Every Flush

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This Simple Project model addresses the core pain point of back outlet toilets head-on: the 19-inch seat height is genuinely taller than the standard ADA 17-inch range, making it a strong match for tall individuals or anyone with knee or hip stiffness who struggles to rise from lower bowls. The P-trap is integrated into the ceramic body, so sewer gases stay sealed without relying on a wall carrier, and the included extension pipe gives you some tolerance if your drain outlet sits slightly behind the standard position.

The dual-flush mechanism offers a 1.0 GPF half-flush and a 1.28 GPF full-flush, both of which work through a 3-inch flush valve that moves water quickly. Multiple verified purchasers confirm the unit works well for seniors and that the bowl clears solid waste without needing a second flush, though one review noted the ceramic surface does occasionally retain residue on low-water settings. At 86.4 pounds, this is a two-person lift, and the soft-close seat is included, saving a separate purchase.

Installation is straightforward if your rough-in center matches the 7.5-inch floor-to-drain spec. The factory-direct seller provides one-on-one after-sales support, which helped several buyers resolve minor packaging issues. For a balance of genuine comfort height, rear-discharge compatibility, and reliable flush performance, this is the most complete package in the mid-range tier.

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The Swiss Madison Calice is one of the few rear-outlet toilets that manages to look genuinely clean and modern, thanks to a fully skirted trapway that hides all plumbing underneath the bowl. The elongated two-piece design sits at a standard 16.5-inch height, which is comfortable for average-height users. On the full-flush setting at 1.6 GPF, the water volume is high enough to clear the bowl reliably, which addresses the low-water criticism that plagues many rear-discharge competitors.

Build quality is noticeably tighter than the mid-range tier — the ceramic glaze is even and the flush buttons operate with a crisp feel. However, the discharge tube that ships with the unit is short, and several buyers report needing a Schedule 40 PVC extension to reach their wall connection. The included instructions are thin on specifics for house-side waste pipe preparation, so this model leans toward buyers who are comfortable with a bit of plumbing improvisation or who plan to hire a pro.

The 12-inch rough-in is standard, and the dual-flush buttons let you toggle between a 1.1 GPF liquid flush and the full 1.6 GPF solid flush. One verified review flagged the low standing water level (under an inch) as a problem that required brushing after every solid use — a trade-off to discuss with your household before purchasing. Overall, it is the best-looking rear-outlet toilet in its price bracket, provided you are ready to manage the waste-pipe connection.

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The St. Tropez breaks from the pack by hiding the water tank inside the wall cavity, which reduces the visible bowl depth to only 22 inches — a major advantage for tight half-baths or powder rooms where every inch of floor space counts. The bowl itself is a wall-hung unit rated to support up to 500 pounds, and the dual-flush plate offers a 0.8 GPF half-flush and a 1.6 GPF full-flush. The tank frame mounts between standard 16-inch stud spacing, making it suitable for new construction or major gut renovations.

Installation is not for the faint of heart. The metric outflow pipe measures slightly over 3 inches, requiring a Fernco coupling to connect to standard US waste lines. The wall carrier frame also uses metric bolt patterns, which frustrated some DIY installers who expected standard US dimensions. Several buyers noted the tank attachment brackets are engineered for an external wall anchor, so if you are retrofitting into an existing wall, you may need additional blocking behind the drywall.

Once installed correctly, the St. Tropez delivers a sleek, minimalist look that standard two-piece toilets cannot match. The flush action is quiet and the bowl cleans well at 1.6 GPF. This is a specialist tool for a specific mission: a modern, space-saving bathroom where you are already committed to opening the wall for the plumbing. For a simpler swap, stick with a standard rear-outlet model.

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The KE KING delivers a side-lever flush on a one-piece skirted body, which is a rarity at this price point. The MAP score of 1000 grams indicates the toilet can clear a full pound of solid waste in a single flush, backed by a fully glazed trapway fired at 2280°F. The 1.28 GPF single-flush is water-efficient without the complexity of dual buttons, and the one-piece design eliminates the seam between tank and bowl where grime builds up over time.

Multiple buyers praised the powerful jet flush and the quiet soft-close seat. The unit ships ready to install with the flush valve pre-installed, a wax ring, and mounting bolts. However, a few customers reported missing seat-mounting bolts or a defective tank lid — KE KING’s customer service responded within 12 hours and shipped replacements, which is reassuring for a direct-to-consumer brand. At 95 pounds, this is one of the heavier one-piece models, so plan for two strong people or a dolly.

The side flush button is a thoughtful ergonomic touch for users who prefer not to twist around to press a top button. The outer dimensions (26.5 x 15 x 28 inches) are compact enough for most residential bathrooms. If you want a rear-outlet compatible toilet with a forceful flush and a modern skirted look without the premium price tag of Swiss Madison, this is the strongest contender.

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This earlier Simple Project variant shares the same 7.5-inch rear outlet center and floor-mounted design as its higher-spec sibling, but at a more accessible price point. The dual-flush option goes down to 0.64 GPF on the light setting, which is aggressive for water conservation but may require a second flush for solid waste. The full 1.28 GPF setting is adequate for most daily use. A curved extension pipe and complete water parts are included in the box, which is a genuine help for DIY installers.

The included plastic seat has been a point of contention — several reviews note it does not sit flush against the bowl or feels too light compared to the ceramic. The toilet itself has a sleek, modern profile and the ceramic finish is well-regarded for the price. One customer reported a manufacturing defect causing a slow leak, and the seller issued a full refund immediately, suggesting responsive after-sales support. Others praised the straightforward assembly and the accurate product photos.

At 90.4 pounds and 24.4 inches deep, it fits into smaller spaces better than most elongated options. The lack of a soft-close seat on some shipped units is a minor frustration, but an aftermarket seat upgrade is a simple fix. For anyone on a stricter budget who needs a functional rear-discharge toilet and does not mind a basic seat, this model delivers the core plumbing compatibility without overspending.

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The HOROW T0338W is a one-piece toilet that squeezes a 17.3-inch ADA chair height into a remarkably short 26.6-inch footprint, making it one of the best options for small bathrooms that still need rear-discharge compatibility. It is a floor-mounted unit with a dual-flush siphon system (1.1 / 1.6 GPF) and a fully glazed 2-inch trapway. The one-piece seamless body makes cleaning far easier than a two-piece, and the 15-inch width allows it to fit close to adjacent fixtures.

Installation is a mixed bag. The large side access openings help with floor mounting, but the water line must be connected before the toilet is set in place, and the seat cover screws are hidden behind the bowl, making adjustments tricky after placement. The unit is exceptionally heavy at nearly 100 pounds, and several buyers reported needing a winch or dolly to maneuver it. The flush performance gets mixed feedback — some call it powerful and effective, while others say it struggles with larger waste loads on the low-flush setting.

The soft-close seat is included and the chrome flush buttons are easy to press, though they are positioned on the top tank and can be awkward to reach if the toilet sits close to a wall. HOROW provides a 1-year warranty and reportedly responsive customer service. If your space is tight and you need a rear-outlet toilet that does not sacrifice seat height, the HOROW is a solid choice — just budget extra time for the heavy install.

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The Gerber Maxwell Crest is a traditional two-piece, floor-mounted toilet that, while not a dedicated back-outlet model in the wall-hung sense, offers a standard 12-inch rough-in rear discharge configuration suitable for many slab and basement applications. It uses a 1.28 GPF high-efficiency flush driven by a 3-inch flush valve and a Fluidmaster 400A fill valve, both of which are industry-standard components that are easy to service or replace with parts from any hardware store.

Customer feedback consistently highlights the powerful, fast flush that clears the bowl without double-flushing. The included soft-close round seat is a welcome inclusion at this tier, and the chair-height bowl (ADA compliant) helps older users or those with knee issues. The round shape saves about 3 inches of front-to-back space compared to an elongated bowl, which matters in tight half-baths. The wax ring and install kit are included, so there are no hidden trips to the store for basic hardware.

Shipping fragility is the main downside — several reviews mention cracked tanks on arrival, though Amazon replaced the units within 24 hours. The vitreous china finish is standard for the price, and the two-piece design does show a seam that requires occasional cleaning. For budget-conscious buyers who prioritize a proven name-brand flush mechanism and easy part replacement over modern aesthetics, the Gerber is a reliable, no-surprises choice.