In the one piece vs two piece toilet decision, the short answer is this: a one piece toilet is easier to clean and usually looks sleeker, while a two piece toilet is usually cheaper, lighter to carry in sections and simpler to repair. Both flush the same way and connect to the same drain, so the choice comes down to budget, cleaning habits, style and who is doing the install.
One Piece vs Two Piece Toilet: The Core Difference
A one piece toilet is molded as a single unit, with the tank and bowl fused together in one piece of vitreous china. A two piece toilet, sometimes called close coupled, has a separate tank that bolts onto the back of the bowl with a rubber gasket between them.
Ferguson describes the two piece toilet as the most common residential type in the United States and one of the least expensive options, and notes that one piece units have fewer seams, which makes them easier to clean and less prone to leaks. You can read their overview in Ferguson’s guide to toilet types.
One Piece Toilet Pros and Cons
Pros
- Easier toilet cleaning. There is no gap between the tank and bowl where grime and moisture collect.
- Cleaner look, often with a skirted trapway.
- Fewer joints. With no tank to bowl connection, there is one less gasket that can wear out and leak.
Cons
- Higher price in general, because the single casting is harder to produce.
- Heavier to handle. You carry the whole toilet at once, so it is a two person job up stairs or through tight doorways.
- Costlier to replace if damaged. A cracked tank means replacing the whole unit.
Two Piece Toilet Pros and Cons
Pros
- Lower price at most brands and retailers.
- Easier to carry. The tank and bowl move separately, so each lift is lighter.
- Repairable. If the tank cracks, you can often replace just the tank, and the tank to bowl gasket is an inexpensive part.
Cons
- Harder to clean where the tank meets the bowl.
- One more seal to maintain. The tank to bowl gasket and bolts can loosen or leak over the years.
Toilet Cleaning: Where One Piece Wins
If cleaning is your top concern, a one piece toilet with a skirted trapway is hard to beat. WoodBridge, for example, describes the skirted trapway on its B0933 and T-0020 as having no corners or grooves to reach into. On a two piece toilet, plan to wipe the seam behind the seat regularly.
Skirted Toilet Design and Footprint
A skirted toilet hides the S shaped trapway behind smooth sides. It is a styling and cleaning feature, and far more common on one piece models.
Footprint varies more by model than by type. In our catalog, the compact WoodBridge T0031-CH lists dimensions of 24.3 x 14.5 x 27.8 in, while the Swiss Madison St. Tropez lists 15.5 in wide, 27 in deep and 31.5 in high. Measure your space, including clearance in front of the bowl, which local code sets.
Height Options and Comfort
Both types come in standard and chair height versions. Chair height (also called comfort height) is generally 17 to 19 in from floor to seat, which many taller adults and people with limited mobility find easier. WoodBridge lists 17 to 19 in with the seat for its chair height models such as the T-0019, T-0020 and B0941, and Swiss Madison lists 17 to 19 in for the St. Tropez. If accessibility matters, confirm the exact height on the spec sheet.
Toilet Installation Weight and Handling
Installation steps are nearly identical: wax ring, flange, floor bolts, supply line. The difference is the lift. A two piece lets you set the bowl first and mount the tank after; a one piece goes down onto the wax ring in one awkward lift.
Listed weights in our catalog range from 70.5 lb for the ANZZI Odin and 99 lb for the WoodBridge Moder (T-0032-CH) up to 152 to 154 lb on some WoodBridge listings. Plan for two people either way.
Rough in, the distance from the finished wall to the center of the drain, is most often 12 in, and that is what most of our models list. Measure yours before ordering; we will cover rough in measurements in a separate guide. A licensed plumber and your local code have the final word on any toilet installation.
Price Ranges
Across the market, two piece toilets usually start lower, and one piece toilets cost more for a similar flush and finish. In our store most toilets are one piece, and our two piece selection is limited. Current one piece prices run from $374.39 for the ANZZI Odin to $1,080 for chair height WoodBridge models, and one piece models with a bidet seat included start around $660.96. If you are weighing a smart model, see our smart toilet vs bidet seat guide.
Toilets We Stock: Specs and Prices
| Toilet | Type | Price | Flush | Rough in | Listed dimensions | Listed weight |
|---|---|---|---|---|---|---|
| ANZZI Odin T1-AZ056 | One piece | $374.39 | 1.6 GPF dual flush | 12 in | Not listed | 70.5 lb |
| WoodBridge Moder T-0032-CH | One piece, skirted | $467 | Dual flush | 12 in | 26.375 x 14.5 x 27.875 in | 99 lb |
| ANZZI TL-AZ07 with bidet seat | Two piece | $649 | 1.28 GPF | 12 in | Not listed | Not listed |
| Swiss Madison St. Tropez with bidet seat | One piece, skirted | $660.96 | 1.1/1.6 GPF dual flush | Not listed | 15.5 W x 27 D x 31.5 H in | Not listed |
| WoodBridge B0933 | One piece, skirted | $960 | 1.0 to 1.28 GPF dual flush | 12 in | 32 x 20 x 28 in | 154 lb |
| WoodBridge T-0019 | One piece, chair height | $960 | 1.0 to 1.28 GPF dual flush | 12 in | 31 x 18 x 28 in | 152 lb |
| WoodBridge T0031-CH compact | One piece, skirted | $960 | Not listed | Not listed | 24.3 x 14.5 x 27.8 in | 130 lb |
| WoodBridge T-0020 | One piece, chair height | $1,080 | 1.28 GPF | Not listed | 29 x 15 x 28 in | 138 lb |
| WoodBridge B0941 Black | One piece, chair height | $1,080 | Not listed | Not listed | 31 x 18 x 28 in | 154 lb |
Specs come from each product page; WoodBridge listings may show carton dimensions and weights, so check the spec sheet before planning your install. Browse the full lineup on our WoodBridge brand page or see more styles from Swiss Madison.
Repairs and Long Term Maintenance
Flush and fill valves wear out on both types. A two piece toilet adds the tank to bowl gasket and bolts, which a kit replaces. One piece models avoid that joint but often use model specific flush parts, so keep the model number handy.
Which Should You Buy?
- Choose one piece if you want the easiest cleaning, a skirted modern look or a compact powder room toilet.
- Choose two piece if budget is tight, you are carrying it up narrow stairs alone or you want the simplest part replacement.
- Consider other types if you want to free up floor space; our wall hung toilet guide explains in wall carriers, and our bathroom vanity sizes guide helps you plan the rest of the room.
Frequently Asked Questions
Is a one piece toilet better than a two piece toilet?
Not universally. A one piece toilet is easier to clean and has one less seal, while a two piece toilet usually costs less and is easier to carry and repair.
Do one piece toilets leak less?
They eliminate the tank to bowl joint, which is a common leak point on two piece toilets. Both types can still leak at the supply line, the fill valve or the wax ring at the floor.
Is a skirted toilet harder to install?
It can take more care because the floor bolts are hidden or side mounted. Follow the install guide, or hire a licensed plumber.
How heavy is a one piece toilet for installation?
Our listings range from 70.5 lb to about 154 lb, and some figures may include packaging. Plan on two people.
Questions about fit or rough in? Call us at 866-777-2590, Mon-Fri 9AM-6PM PST. Orders of $999 or more ship with free freight shipping, and you can review our return and refund policy before you order.
