Coway Bidetmega 400


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Important: See which Coway Bidetmega bidet toilet seat is compatible with your toilet here.

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Only the Coway Bidetmega 400 bidet provides our highest level of personal health and cleanliness. We are now offering a 90-day trial so you can be sure our bidet is right for you.

The easy to install bidet toilet seat is designed to fit both round and elongated toilet bowls, depending on your need. Upkeep is also easy, shown in our maintenance video.

The Coway Bidetmega 400 bidet features advanced i-wave cleaning technology for a multi-stage wash that adjusts pressure, temperature and motion for optimal hygiene. Plus, a triple-stage bidet wash care system that keeps the water path, nozzle and toilet free of contaminants.

Not to mention a night light, all-new wireless remote, heated seat and dryer, Braille, front and child mode, an eco-friendly function, waterproof design and so much more.

Advanced i-wave Technology

Improved i-wave cleaning technology for optimized customization, including basic, active move, soothing wash, and front modes.

Triple Cleaning

Exclusive three-stage cleaning care system (water path + nozzle + toilet) gives you better health and peace of mind.

Night Light

Find the toilet without worry with this Coway Bidetmega 400-only feature. This feature can be turned on and off based on your preference.

All-New Wireless Remote

Improved, high-quality transmitter makes using your bidet more convenient and more sanitary.

Braille & Child Mode

The thoughtful touch panel design includes a Braille control panel and child mode that adjusts the position, temperature and pressure for children.

Multiple Modes

The bidet can be adjusted to accommodate individual preferences for water temperature, water pressure, seat temperature and energy-savings.


Dimension (W) x (D) x (H)

16.59 in (W) x 19.94 in (D) x 5.31 in (H)
16.59 in (W) x 21.2 in (D) x 5.31 in (H)


Round: 16.5 lb
Elongated: 17 lb

Rated Voltage

120 V~ 60 ㎐

Operating Water Pressure

0.1 MPa ~ 0.68 MPa

Power Cord

47.2 in (1.2 m)





Provided Installation Materials

2 anchor screws, 2 anchor rubbers, 2 anchor washers, 2 anchor nuts, 1 bidet hose, 4 rubber packing, 1 installation plate, 1 fixing slider, 1 T connector (7/8”), 1 T connector (3/8”), 1 conversion bolt/nut set (3/8”-1/2”)


Customer Reviews

The Superior Booty Washer

Why would you choose paper over a warm stream of water hitting directly upon your sphincter. This blessed creation is a gift from God himself. Everyone in America deserves a superior clean when they go to meet their maker. The Conway BidetMega400 does not disappoint! (show less) Why would you choose paper over a warm stream of water hitting directly upon your sphincter. This blessed creation is

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