Choosing a toilet sounds simple until you walk a Home Depot aisle, count fifty boxes between $89 and $4,200, and realize none of them tell you whether they'll fit your bathroom or solve the problem that brought you in. This category page is the start of an unbiased map. Every linked article here is hand-written by someone who has rebuilt the fill valves and lifted the wax rings — not by an AI synthesizing affiliate review sites.
The four numbers that decide which toilet fits your bathroom
Before brand or color, four physical specs decide whether a toilet even works in your room. Get these wrong and the rest doesn't matter.
- Rough-in: the distance from the finished wall behind the tank to the center of the floor drain. 12 inches is the US standard since the 1980s and what 90% of toilets ship in. 10 inches is common in pre-WWII homes; 14 inches shows up in some commercial and Canadian installations. Measure before you buy — guessing wrong forces an offset flange or returns. Full rough-in guide →
- Bowl shape: round bowls are ~16.5" front-to-back and save 1–2 inches in tight powder rooms; elongated bowls are ~18.5" front-to-back and are universally rated more comfortable. ADA-spec public restrooms require elongated. Elongated vs round →
- Bowl height: standard seat height is 14–15 inches from floor to seat. Comfort height (also called "chair height" or ADA-compliant) is 17–19 inches — easier on knees, harder on small kids. Comfort height comparison →
- Gallons per flush (GPF): the federal maximum has been 1.6 GPF since 1994. The EPA WaterSense voluntary spec is 1.28 GPF or lower. Californian shoppers and anyone in a state-rebate zone (CA, TX, AZ, NV, parts of FL) should look for the WaterSense label — rebates of $30–$200 per fixture are still active in 2026 in many municipalities. Niagara, Kohler, and TOTO offer sub-1.0 GPF models that qualify. GPF and WaterSense →
The toilet types you'll actually see for sale
The marketing language is messy. Here's what the categories actually mean and which problem each one solves.
- One-piece — tank and bowl molded as one porcelain unit. Easier to clean (no seam to harbor grime), heavier to install (one person can't manage it on a finished floor), more expensive at equivalent flush performance. ~$300–$1,200.
- Two-piece — separate tank bolted to the bowl with a rubber gasket and two brass bolts. Standard format, easier to handle, easier to replace one half if it cracks. ~$120–$700.
- Comfort-height — taller seat (17–19"). The default specification for new construction since around 2015 because aging boomers asked for it. May not be ideal in households with small children.
- Bidet-toilet combos — toilets with built-in cleansing wash (heated water, adjustable nozzle, often heated seat and dryer). TOTO Neorest and Kohler Numi are the flagships; Horow now sells comparable feature sets at half the price. For add-on bidet seats and attachments, see our dedicated bidet category.
- Smart toilets — overlapping with bidet combos plus motion-sensor lid, auto-flush, foot-sensor open, app integration. Worth it for the heated seat and night-light alone in cold-climate bathrooms.
- Composting toilets — no plumbing, no water, urine and solids handled separately and either composted or removed. Tiny-house, off-grid, and RV market. Nature's Head and Sun-Mar are the volume brands.
- Portable / RV toilets — chemical or cassette, mostly cube-shaped, for camping rigs and unfinished construction. Dometic and Thetford own this segment.
- Wall-hung toilets — bowl bolted to a concealed carrier (Geberit Duofix is the typical choice), tank hidden inside the wall, flush plate on the surface. Common in European-styled US remodels and high-end condos. Adjustable height during install is a real advantage in ADA-conversion projects.
- Macerating / upflush — Saniflo's invention. A small electric pump grinds and pumps waste up to 15 feet vertical or 150 feet horizontal to reach an existing soil stack. The answer for basement bathrooms when you don't want to break the slab.
- Pressure-assist — uses compressed air to force water out at higher velocity for stronger flush in low-GPF designs. Loud, expensive to repair, but unbeaten on serious clog resistance.
The brand landscape (US market)
Twenty brands you'll see in US toilet aisles cluster into three tiers:
Tier 1 — Volume + reputation
Kohler (Wisconsin), TOTO (Japan, US-manufactured in Georgia), and American Standard (US, owned by Lixil) cover the largest share of the residential market. Kohler's strength is design breadth — Highline, Cimarron, Memoirs, Wellworth across every price point. TOTO leads on flush performance (their Cyclone, Tornado, and CeFiONtect bowl-glazing technologies are the technical references). American Standard's Champion series is the value play for landlord rebuilds.
Tier 2 — Specialists and regional
Niagara (Texas) owns the low-flow category — their Stealth Sabre 0.8 GPF is the lowest-flow gravity toilet certified by IAPMO. Saniflo (France) defines the macerating category. Mansfield (Ohio) still casts toilets in the US for the plumber-trade channel. Gerber (Illinois) is the spec-house default in mid-market new construction. Duravit and Geberit are the European-designer wall-hung references.
Tier 3 — Value brands and house labels
Glacier Bay is Home Depot's house brand — typically OEM'd from Foremost or KOHLER through a private-label arrangement. Swiss Madison and Woodbridge compete in the Wayfair / Amazon mid-budget designer segment. Horow brings smart-toilet features to a budget price point. Jacuzzi coordinates with their tub line for full-suite bath remodels. DeerValley is a direct-to-consumer Amazon brand competing on price.
Repair or replace? The honest signal
Most US homeowners keep a toilet for 15–25 years before replacement. Components fail much sooner. The order in which things break:
- Flapper (3–5 years) — the rubber seal at the bottom of the tank that lifts when you press the handle. Most common cause of a running toilet. $4–$15 part, 10 minutes to replace.
- Fill valve (7–10 years) — refills the tank after flush. Whistling, slow fill, or a tank that won't shut off all point here. Fill valve guide →
- Flush valve / flapper seat (10–15 years) — the larger plastic outlet under the flapper. Mineral buildup eventually pits the rubber-to-plastic seal. Flush valve replacement →
- Wax ring (15–25 years, sometimes sooner if installed poorly) — the gasket between bowl and floor flange. Leaking at the base, slight rocking, or sewage smell are signals. Wax ring guide →
- Tank-to-bowl gaskets and bolts (15–25 years) — a leak that appears where the tank meets the bowl. Cheap to fix, but requires draining the tank.
Replace the whole toilet when: the bowl is cracked, the porcelain is hairline-fractured around the base (you'll see it after a hard winter freeze), the existing toilet is pre-1994 and using 3.5+ GPF, the flush has degraded so badly that you double-flush habitually, or you're remodeling the bathroom anyway. Estimate $200–$400 for the toilet plus $150–$350 plumber labor for a standard like-for-like swap.
Need a plumber today? Toilet repair service · Installation service · Replacement service
What's in this section of WaterClue
- Best toilets — overall buyer shortlist
- Toilet buying guide — every decision factor
- Repair hub — running, clogged, leaking, flush problems
- Parts hub — flapper, fill valve, flange, wax ring, seat selection
- Service hub — find a local plumber for repair, install, replacement
- Browse by one-piece, comfort-height, bidet, smart, composting, portable, wall-hung, macerating, and more.