4 inches faucets are perfect for smaller bathrooms, and they also take up less space than 8 inch faucets. These types of faucets are popular choices for people looking to install a bathroom vanity. There are several different types of these faucets, so you'll need to choose the right one for your space.

Centerset Faucets

A centerset faucet is the most common type of bathroom vanity faucet. This style requires three holes on the sink or mounting area and is usually centered over the sink. In this configuration, the water handles and faucet share a small deck plate with hole spacing typically around four inches between the hot and cold lever holes.

Single-Hole Faucets

The Single-Hole faucets is a great choice for homeowners looking for a simple, minimalist single-hole faucet. It has a sleek, modern design.

It also uses 20% less water than standard faucets, which can help you save money on your energy bills. 

Spout Reach

The spout of a single-hole faucet should extend between a quarter and halfway across the sink. This enables the water to hit the center of the sink, which prevents splashing. The spout should also be curved or oval-shaped to avoid hitting the back of the sink.

This faucet comes with a deck plate, valve, and installation parts, so you can easily set it up in your bathroom. It's WaterSense certified, which reduces water use with high efficiency, and it has a ceramic disc cartridge that helps prevent drips and leaks.

If you don't have an outlet to plug it into, this faucet can be powered by four AA batteries. It also has a push-down drain assembly, so it's easy to install and remove without a hose.

These faucets can be a little more expensive than some other options, but they're worth the splurge if you want a luxurious feel to your bathroom. They're available in a range of modern styles, and they come with two cross handles that make it easy to adjust the flow and temperature of your water.

They're made from durable metal, so they can handle daily use. Plus, they're ADA compliant and water-sense certified to reduce your water usage by 20%.

Some of these faucets have attached spouts and handles, while others have them on separate bases. These centerset faucets look neat and tidy and are ideal for smaller bathrooms or small vanities.