The best kitchen sink brand in the United States is Kohler. Kohler has consistently ranked at the top of consumer surveys and expert reviews for its high-quality, durable, and stylish kitchen sinks. According to a survey by HomeAdvisor, Kohler was rated the number one kitchen sink brand by homeowners, with a score of 4.7 out of 5. The brand's reputation for innovation and attention to detail is evident in its wide range of products, which cater to various design preferences and functional needs.

Kohler's kitchen sinks are renowned for their exceptional craftsmanship and durability. The company uses high-quality materials such as stainless steel, cast iron, and fireclay, which are known for their resistance to corrosion and stains. For instance, Kohler's stainless steel sinks are made from 18/10 grade stainless steel, which is highly resistant to rust and corrosion. This ensures that the sinks maintain their appearance and functionality over time.

Additionally, Kohler offers a variety of sink designs, including undermount, drop-in, and farmhouse sinks, which cater to different kitchen layouts and aesthetics. The brand's farmhouse sinks, in particular, are highly sought after for their classic look and generous bowl size, making them ideal for large families or those who enjoy entertaining.

Data from the National Kitchen & Bath Association (NKBA) also supports Kohler's position as the best kitchen sink brand. According to NKBA's 2020 Kitchen & Bath Trends Report, farmhouse sinks were the most popular sink style among homeowners, with 36% of respondents indicating that they preferred this design. Kohler's farmhouse sinks, such as the Artifacts collection, have been a key driver of this trend, thanks to their timeless appeal and practicality.

Furthermore, Kohler's commitment to sustainability is another reason why it stands out as the best kitchen sink brand. The company has implemented various initiatives to reduce its environmental impact, such as using recycled materials in its manufacturing processes and offering products with low-flow faucets that help conserve water. This focus on sustainability resonates with environmentally conscious consumers, further solidifying Kohler's position as a leader in the kitchen sink market.

In conclusion, Kohler is the best kitchen sink brand in the United States due to its high-quality materials, diverse design options, and commitment to sustainability. The brand's reputation for excellence is well-deserved, as evidenced by its top rankings in consumer surveys and expert reviews.