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Head-to-head · Best Bidet Toilet Seat Attachments

TOTO Washlet S5 (SW3446) vs Tushy Spa 3.0

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

TOTO Washlet S5 (SW3446) comes out ahead by a narrow margin (4.7 vs 4.6). The gap is mostly about buyers who want the full electric-seat experience with a heated seat, dryer, and endless warm water and have a nearby outlet — read the strengths below before deciding.

TOTO Washlet S5 (SW3446)
Higher ratedRanked #1 in Best Bidet Toilet Seat Attachments
TOTO Washlet S5 (SW3446)
$682as of Jun 7

The TOTO Washlet S5 is the premium pick - a full electric bidet seat that replaces your toilet seat and adds a heated seat, instantaneous endless warm water, a warm-air dryer, automatic deodorizer, and self-cleaning wand tech (EWATER+ and PREMIST). Wirecutter named it the best bidet seat. It costs roughly ten times an attachment and needs a power outlet, and a few owners report leaking over time, but for the full luxury experience nothing here is close.

Strengths
  • — Instantaneous water heater delivers endless warm water at 95-104F
  • — Heated seat (82-97F) with warm-air dryer (three temps) and automatic deodorizer
  • — Front, rear, and soft-rear washes with oscillating and pulsating options
Watch-outs
  • — Far more expensive than any non-electric attachment, often $700+
  • — Requires a nearby GFCI power outlet - electrician may be needed
  • — Some owners report occasional water leaking over time
$682 · Check Price on AmazonFull review →
Tushy Spa 3.0
Ranked #4 in Best Bidet Toilet Seat Attachments
Tushy Spa 3.0
$149as of Jun 7

The Tushy Spa 3.0 is the clever middle ground: warm water without electricity. By tapping your bathroom sink's hot-water line it heats the wash with no outlet or wiring, keeping all the comfort-tuned spray and easy install of the Classic. The warmth is only as good and as fast as your sink's hot water, and it needs sink access, but for buyers who want heated washes without the cost and rewiring of an electric seat, it is a genuinely smart value.

Strengths
  • — Delivers warm water with no electricity by tapping the bathroom sink's hot line
  • — Self-cleaning SmartSpray nozzle rinses before and after each use
  • — Adjustable pressure and nozzle angle, same comfort-tuned spray as the Classic
Watch-outs
  • — Warm-water temperature depends entirely on how fast your sink's hot water arrives
  • — You must flush cold water out of the hose before the wash turns warm
  • — Requires sink access, so plumbing layout can limit installation
$149 · Check Price on AmazonFull review →

How they stack up

TOTO Washlet S5 (SW3446)

The luxury electric seat in this lineup - it adds a heated seat, warm-air dryer, deodorizer, and instantaneous endless warm water that no non-electric attachment can match, but it costs roughly ten times the Luxe Bidet Neo 320 Plus or Tushy Classic 3.0 and needs a power outlet; the Tushy Spa 3.0 approximates its warm water without electricity, and the Brondell SimpleSpa Thinline is its budget opposite.

Tushy Spa 3.0

The non-electric warm-water pick - it adds heated washes to the comfort-tuned spray of the Tushy Classic 3.0, and undercuts the electric TOTO Washlet S5 by hundreds of dollars; the dual-nozzle Luxe Bidet Neo 320 Plus also offers optional warm water for less, while the budget Brondell SimpleSpa Thinline stays cold-water only.

Specs side-by-side

SpecTOTO Washlet S5 (SW3446)Tushy Spa 3.0
TypeElectric bidet seat (washlet)Non-electric warm-water attachment
Water HeatingInstantaneous, 95-104F (endless)—
Heated SeatAdjustable 82-97F—
DryerWarm air, 3 temperatures (95-140F)—
Wash ModesFront, rear, soft rear; oscillating + pulsating—
Self-CleaningEWATER+ wand + PREMIST bowlSmartSpray, rinses before + after
RemoteWireless, memory for 4 users—
FitElongated—
Nozzles—Single, angle-adjustable
Water Temperature—Cool to warm (sink hot line)
Pressure Control—Adjustable knob
Install Time—About 10 minutes
Requires—Sink access for warm water
Power—None - water pressure driven
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