“Under-sink faucets” are devices used to control the flow of hot and cold water in a sink or sink. They are called “under-sink” because they are usually installed under the sink or sink and are used to turn the water on and off when needed. These faucets are common in kitchens and bathrooms and are essential for regulating water temperature and providing water for various purposes, such as washing dishes or washing hands.

Some common features of under-sink faucets include:

1. Double faucets: Most under-sink faucets have two separate handles, one for hot water and one for cold water. This allows you to adjust the water temperature according to your needs.
2. Ball or compression valves: Under-sink faucets can have ball or compression valves. Ball valves are easier to operate and require less effort to open or close the water, while compression valves require a longer rotation of the handle.
3. Materials: They are available in a variety of materials, including brass, stainless steel and plastic. Brass faucets are generally considered to be of high quality and durable.
4. Size and style: Under-sink faucets are available in different sizes and styles to match the design of the sink or vanity and personal taste.

When choosing an under-sink faucet, it is important to consider quality, durability and compatibility with the existing plumbing system. It is also important to ensure that the installation is done correctly to avoid water leakage and other problems. If you are unfamiliar with faucet installation or do not feel confident to do it yourself, it is advisable to hire a professional plumber for installation.