The minimum height knee clearance under a sink for ADA is _______ inches above finish floor.

The minimum height for knee clearance under a sink to meet the Americans with Disabilities Act (ADA) regulations is set at 27 inches above the finish floor. This standard is established to ensure accessibility for individuals who use wheelchairs or have mobility challenges, allowing them to comfortably position themselves under the sink without obstruction.

The specified height of 27 inches accommodates a range of users, promoting inclusivity in restrooms, kitchens, and other spaces where sinks are installed. A lower height, like 27 inches, ensures that users can access sinks easily and safely, which aligns with the ADA's intention to eliminate barriers for people with disabilities.

In contrast, the other heights listed, such as 29, 31, and 32 inches, do not comply with the ADA guidelines for knee clearance. These heights would not provide the necessary clearance for many wheelchair users and could hinder their ability to use the sink effectively. Therefore, understanding the importance of the correct measurement helps ensure that plumbing installations are both safe and accessible.