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SKU #: TOT3646

Toto 15" Undercounter Bathroom Sink

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Toto 15" Undercounter Bathroom Sink


  • Includes mounting screw set
  • Bathroom sink
  • Front or rear overflow
  • ASME certified
  • IAPMO(cUPC) certified
  • ADA compliant
  • Vitreous china construction
  • Manufacturer provides one year limited warranty

Product Details:

  • Installation Type: Undermount sink
  • Style: Contemporary
  • Sink Shape: Oval
  • Material: Other
  • ADA Compliant: Yes


  • Overall: 15" L x 12" W

Special Offer:

56 Issues of Sports Illustrated Magazine

Included with purchase ($20 value). 

Toto 15" Undercounter Bathroom Sink

Additional Documents

Specifications sheet

Weights & Dimensions

  • Overall: 15" L x 12" W
  • Bowl depth : 12"
  • Sink Depth:8.125


Installation Type: Undermount sinkStyle: Contemporary
Sink Shape: OvalMaterial: Other
  • Material Details: Vitreous China
Number of Faucet Holes: 0Overflow: Yes
Country of Manufacture: Japan 


ADA Compliant: Yes 

About the Manufacturer

For over 80 years, Toto has been committed to producing superbly designed, high performance products. They go beyond simply providing you with attractive products in various colors. They focus on creating products with consistent, exceptional performance and design.

TOTO is the largest toilet manufacturer in the world, producing more than 7 million toilets annually. With over 1,500 engineers on staff, they're an industry leader in performance, technology, and innovation. In order to meet their growing demand, Toto has constructed two US manufacturing plants to produce their complete line of bathroom fixtures. Every TOTO Product Undergoes A Scrutinizing Inspection Process Under a Discriminating Eye

Their state-of-the-art plant in Morrow, GA is outfitted with some of the most technologically advanced equipment in the industry. From their molding process to the finishing touches, their products are constructed and fine-tuned with computer precision. But they also feel that certain stages in the process demand the human touch. And that's where their professionally trained personnel come in to inspect products that they sell. Ensuring you receive quality bathroom fixtures you can rely on.

Toto's success demands an ongoing pursuit of perfection. It's a pursuit that pushes them beyond industry standards. A pursuit that drives them to become one of the most decorated toilet manufacturers in the world. It is quite simply, the passionate pursuit of perfection.

Nearly a century of experience. An industry leader offering performance, technology, and innovation. Perfect balance in form and function. This is what you should expect from your bathroom fixtures. This is TOTO. Perfection by design.


The 15" Undercounter Bathroom Sink is a Contemporary style product. Contemporary style bridges the gap between traditional and modern. Pieces feature simple and clean lines with smooth surfaces without any carving or adornment. You can shop for more Contemporary Bathroom Sinks in the Home Improvement section of our site.

Toto 15" Undercounter Bathroom Sink

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    Questions & Answers (2)


    “Hi, what is the bowl depth of the sink?” asked by Elliott

    "Hi Elliott, the bowl depth of the sink is 12"." Johnathan from Wayfair


    “Hi, what is the depth of the bathroom sink?” asked by Elliott

    "Hi Elliott, the depth of the bathroom sink is 8.125"." Devin from Wayfair

    When you buy a Toto 15" Undercounter Bathroom Sink online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the Toto Part #: LT577 here. If you have any questions about your purchase or any other Bathroom Sinks product for sale our customer service representatives are available to help.Whether you just want to buy a Toto 15" Undercounter Bathroom Sink or shop for your entire home, Wayfair has a zillion things home.
    See something odd? Report it here.

    Customer Reviews

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    Tell us what you think about the 15" Undercounter Bathroom Sink. It will help us provide you with better products in the future and help your fellow Wayfair shoppers make better purchases.

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    Average Overall Rating
    (based on 6 reviews)

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    Great product that matches the desciption!

    from centenial, CO – Verified Buyer

    Toto brand sinks are truly white and this size accommodates the standard bathroom vanity top. We ordered 4 sinks, and they were delivered in 4 days. They were packaged individually with large amounts of foam to ensure that they wouldn't be damaged during transport. They look great!!

    Was this helpful? Yes0 No0

    Nice sinks

    from Fair Lawn, NJ – Verified Buyer

    Nice looking off-white sinks which fit well in an 18 inch deep vanity, although the faucets had to be mounted on an angle to fit. Came in good shape and fast.

    Was this helpful? Yes2 No0

    Toto Undercounter Bathroom Sink: Sedona Beige

    from Webster, NY – Verified Buyer

    Perfect! This sink is excellent quality and just slightly smaller than the ones in stock at the granite supplier I was using. It is perfect for my small cabinet in our powder room. Not too small, just right. Couldn't be happier!

    Was this helpful? Yes2 No0


    from Tampa, FL – Verified Buyer

    I love almost all Toto products. This is a very charming and sweet looking sink. It is timeless, and since it is under-mount, it has an updated look.

    Was this helpful? Yes1 No0

    make sure you measure!!

    from Andes, NY – Verified Buyer

    Made the mistake of measuring the wrong ways, the first time around. Carefully look at the product description and make sure you are getting the right size! Pros: sleek and easy to install

    Was this helpful? Yes0 No0

    from United States – Verified Buyer

    Was this helpful? Yes0 No0

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    OUR SKU # TOT3646

    15" Undercounter Bathroom Sink is also sometimes listed under the following manufacturer numbers: LT577#01, LT577#12

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