What a TOTO WASHLET+ Set Actually Is
A WASHLET+ set is a TOTO toilet and a TOTO WASHLET bidet seat sold as one engineered pair, with the seat's power cord and water supply hose routed inside the china. TOTO states it plainly: "The WASHLET+ system neatly conceals the WASHLET power cord and water supply hose for a clean installation." Nothing runs down the back of the bowl.
That is the difference buyers are actually shopping for. A standalone WASHLET seat mounts on the toilet you already own, but its hose and cord stay visible. A WASHLET+ toilet is built with a concealed path for them, and TOTO also minimizes the gap between toilet and seat so the fixture reads as one continuous line. It is a look you cannot retrofit.
What ships is the whole fixture. A two-piece set arrives as the bowl, the tank and cover, and the WASHLET seat; a one-piece set arrives as a single china body plus the seat. TOTO lists an auto-flush kit as an optional component on the sets that support it. Everything here is a complete bidet toilet - you are replacing the fixture, not adding to it.
The toilet underneath brings TOTO's own bowl technologies:
- TORNADO FLUSH - "two powerful nozzles that create a centrifugal, cyclonic rinsing action which reduces waste buildup and keeps the bowl cleaner," with a hole-free rim that is simpler to wipe down.
- CEFIONTECT - an "extraordinarily smooth" glaze that "prevents particulates from adhering to porous, ceramic surfaces."
- PREMIST - "PREMIST wets the surface of the toilet bowl, aiding in the removal of waste and resulting in a better clean."
- EWATER+ - "Electrolyzing water produces a sterilizing agent (hypochlorous acid) that is used to keep the wand and toilet bowl hygienic." TOTO describes the S7A as misting and cleaning the bowl water after every use.
Can You Put a TOTO WASHLET on Any Toilet?
You can put a standalone TOTO WASHLET on most toilets you already own, but a WASHLET+ seat is not a universal seat - it belongs to its WASHLET+ toilet. TOTO draws the line clearly: a WASHLET bidet seat "takes the place of your existing toilet seat and will fit most North American toilets," while "WASHLET+ models seamlessly connect a high-performance TOTO toilet and luxury WASHLET+ bidet seat with no visible hoses or cords."
So the real question is whether the toilet is staying. If it is, buy the seat on its own from TOTO WASHLET seats or the wider bidet toilet seat range, and measure the bowl first - about 16.5 inches from the seat bolts to the front rim means a round bowl, about 18.5 inches means elongated. If the toilet is coming out anyway, a WASHLET+ set gives you the concealed connection. For the fully integrated version, with no separate seat at all, look at TOTO NEOREST.
How to Choose a TOTO WASHLET+ Set
Choosing a WASHLET+ set is two decisions stacked: which WASHLET seat you want, and which toilet you want it on. The seat decides how the fixture feels every day. The toilet decides whether it fits your bathroom at all.
Which TOTO WASHLET Toilet Is Considered the Best?
The best TOTO WASHLET toilet for most buyers is an S7A set, because the S7A is the top seat in TOTO's WASHLET range - instant unlimited warm water, an auto open-close lid, auto flush and a self-cleaning wand. Whether it is the best for you depends on how many of those you would use:
- WASHLET S2 - the entry-level seat. Heated seat, warm water, adjustable pressure and a remote.
- WASHLET S5 - adds a warm air dryer. The middle of the range and the most popular choice.
- WASHLET S7 - instant unlimited warm water, a warm air dryer, an auto open-close lid and a self-cleaning wand.
- WASHLET S7A - the S7 plus auto flush, and EWATER+ working on the bowl water after every use.
The step that changes daily use most is the water heating. TOTO lists instantaneous heating on the S7 and S7A, so the warm wash does not run out. A seat heating from a small reserve gives roughly 40 seconds of warm water before it reheats - fine for one person, less so for a busy family bathroom.
Then Pick the Toilet Underneath
Four things about the toilet decide the purchase, and three of them are measurements.
- Rough-in. Measure from the finished wall behind the tank to the center of the closet bolts. Twelve inches is standard; 10 and 14 inch exist. The series differ here - Nexus comes in 12 and 14 inch only, Drake handles 10 inch as a separate toilet rather than an adapter, and UltraMax, Drake II, Connelly and Supreme II are 12 inch only. Our rough-in size guide covers every series we stock.
- Height. Universal Height puts the seat about 17 to 19 inches off the floor against roughly 15 inches for standard height, and TOTO encodes it in the model number - an F in the SKU means Universal Height. Most sets here are Universal Height; compare the two heights if you are undecided.
- Shape and footprint. One-piece sets have no tank-to-bowl seam to clean; two-piece sets cost less and are easier to carry upstairs. Where floor space is tight, wall-hung sets put the tank in the wall.
- Flush volume. Most sets here are 1.28 GPF, and several series also come in a 1G version at 1.0 gallon per flush.
Do You Need a Plumber to Install a WASHLET+ Set?
You do not need a plumber to install a TOTO WASHLET seat, but a WASHLET+ set is a different job, because you are setting a whole toilet rather than swapping a seat. A seat alone takes 30 to 60 minutes with an adjustable wrench: shut the supply valve, unbolt the old seat, mount the bracket, fit the T-valve to the fill line, connect the hose and check for leaks. Our bidet installation guide covers it step by step.
A full set adds the parts most people hand over: removing the old toilet, setting a new seal on the flange, leveling and bolting the bowl, and routing the cord and hose through the concealed channel. Full smart toilets often warrant professional installation for that reason. Doing it yourself costs nothing in labor; a plumber adds an installation fee, and a missing grounded outlet means an electrician too.