Ask a Canadian plumber which toilet they'd put in their own house and the answer usually starts with TOTO — then splits into two camps: the Drake and the Aquia IV. Both are two-piece models, both use a version of TOTO's Tornado Flush, and both earned their reputations the honest way. But they're built around different priorities, and the right pick often hinges on a detail like rough-in distance or how much you dislike cleaning around a trapway. Here's a straight comparison of where each one wins.
The short answer
The Drake is the workhorse: a powerful single-flush toilet at 1.28 gallons (4.8 litres) per flush, with a classic silhouette, exposed-trapway and skirted versions, tank options for 10-, 12- and 14-inch rough-ins, and typically the friendlier price. The Aquia IV is the sleeker option: a fully skirted, dual-flush design using TOTO's Dynamax Tornado Flush, with a slimmer tank and a more contemporary look. You give up some rough-in flexibility and pay a bit more; in return you get easier cleaning and lighter water use.
Tornado Flush vs Dynamax Tornado Flush
Both toilets ditch the old rim-hole design in favour of TOTO's Tornado approach: water enters the bowl through nozzles that create a swirling, centrifugal rinse. The swirl scrubs the whole bowl surface rather than streaking down from the rim, and with no rim holes there's nowhere for mineral buildup to hide — a quiet win in Canadian cities with hard water.
The Drake uses the classic dual-nozzle Tornado Flush and flushes with real authority — it's the model plumbers recommend to households that have fought clogging problems with builder-grade toilets. The Aquia IV uses Dynamax Tornado Flush, a newer refinement that rinses the full 360 degrees of the bowl efficiently even on the reduced flush. Both clear the bowl convincingly day to day. For an objective comparison of bulk-removal performance, look up each model's independent MaP test score — our guide to MaP scores and why they're the one toilet spec that matters explains how to read the numbers.
Water use: single-flush vs dual-flush
The Drake keeps things simple: one lever, one flush volume, 4.8 litres every time — already high-efficiency by modern Canadian standards, so a single-flush toilet is not the water-waster it was twenty years ago.
The Aquia IV gives you two buttons on the tank lid: a full flush for solids and a lighter partial flush for liquids. Since most flushes in a household are the light kind, dual flush trims real litres off daily use — genuinely useful on a well and septic system, on metered water, or if you're simply conscious about consumption. If water savings are your main driver, our practical guide to the best dual-flush toilets in Canada puts the Aquia IV in wider context.
Two honest trade-offs on the Aquia IV side: top-mounted buttons mean the tank lid is no longer a shelf, and a dual-flush valve has more going on inside the tank than the Drake's simple setup. Nothing fragile — but the Drake is about as close to maintenance-proof as toilets get.
Cleaning: the skirted difference
This is where the two really diverge. The Aquia IV is fully skirted: smooth sides, no exposed trapway, no nooks where dust and drips collect. Cleaning the outside is a ten-second wipe — a small-sounding thing that ends up being the feature owners mention most. We cover the category in our roundup of skirted toilets worth buying.
The classic Drake has a traditional exposed trapway — more contours to wipe around, though nothing worse than most toilets you've owned. TOTO does offer skirted Drake variants too, which narrows the gap considerably.
Inside the bowl, both families are available with TOTO's CEFIONTECT glaze, an extra-smooth ceramic finish that gives grime less to grip.
Rough-in flexibility and installation
Here's the spec that quietly decides this comparison for many Canadian buyers. The rough-in is the distance from the finished wall to the centre of the drain, and plenty of older homes — wartime houses, mid-century bungalows, older condos — have a 10-inch rough-in instead of the modern 12-inch standard. The Drake handles this gracefully, with tank options for 10-, 12- and 14-inch rough-ins. The Aquia IV is designed around a standard 12-inch rough-in, so if your measurement comes up short, the decision may be made for you. Measure before you order — our guide to measuring a 10-inch vs 12-inch rough-in takes two minutes and can save you a return shipment.
On installation: both are two-piece toilets, arriving as a separate bowl and tank — lighter to carry upstairs and easier to manoeuvre than a one-piece. Skirted models like the Aquia IV mount to a bracket rather than directly over the closet bolts, which adds a step but is routine work for any plumber.
WASHLET+ readiness
Both families come in WASHLET+ versions, designed to pair with TOTO's WASHLET bidet seats so the water line and power cord route invisibly behind the seat instead of dangling at the side. If there's any chance you'll add a bidet seat — now or in a few years — buy the WASHLET+ variant of whichever toilet you choose; a standard toilet still accepts a WASHLET, but the connections stay visible. If you're weighing seats, start with our Canadian comparison of the WASHLET S5, S7 and S7A.
Drake vs Aquia IV at a glance
| Feature | TOTO Drake | TOTO Aquia IV |
|---|---|---|
| Flush system | Tornado Flush, single flush | Dynamax Tornado Flush, dual flush |
| Water per flush | 4.8 L (1.28 gal) | Full flush plus reduced partial flush |
| Trapway | Exposed (skirted versions available) | Fully skirted |
| Rough-in options | 10", 12" or 14" tank options | Standard 12" |
| Style | Classic, traditional profile | Sleek, contemporary profile |
| WASHLET+ versions | Yes | Yes |
| Typical price position | More budget-friendly | A step up |
Which one should you buy?
- Pick the Drake if: your rough-in isn't a standard 12 inches, you want maximum flushing power per dollar, or you want the lowest-maintenance toilet TOTO makes.
- Pick the Aquia IV if: you want a modern skirted design that cleans in seconds, dual-flush water savings matter, and you have a standard 12-inch rough-in.
There's no bad outcome here — both are toilets you'll stop thinking about the week after installation, which is the highest compliment a toilet can earn. Browse both families alongside the rest of our two-piece toilets, or compare the full range of toilets from TOTO, Kohler, Duravit and more if you're still weighing formats.
Frequently asked questions
Which is better for an older home with a 10-inch rough-in?
The Drake, clearly. TOTO offers Drake tank options built for 10-inch rough-ins, while the Aquia IV is designed around the modern 12-inch standard. Measure from the finished wall to the centre of the closet bolts before ordering.
Does the Aquia IV's partial flush actually clear the bowl?
For liquid waste, yes — that's what it's designed for, and the Dynamax Tornado swirl still rinses the full bowl surface on the reduced flush. For solids, use the full flush. Used as intended, it doesn't lead to more double-flushing than a single-flush toilet.
Can I add a WASHLET bidet seat to either toilet later?
Yes, both accept WASHLET seats. The difference is tidiness: WASHLET+ versions of the Drake and Aquia IV conceal the seat's water and power connections, while a standard version leaves the hose and cord visible at the side. If a bidet seat is even a maybe, choose the WASHLET+ variant up front.
Are the Drake and Aquia IV comfort-height toilets?
Both families are offered at TOTO's Universal Height, comparable to what other brands call comfort or chair height — a taller seating position most adults find easier on the knees. Deciding between heights for a household with kids or shorter users? See our guide to chair-height vs standard toilets.