A swimming pool eyeball inlet is a type of adjustable water return fitting installed in the walls of a swimming pool. It is designed to direct the flow of filtered and chemically treated water back into the pool, allowing for precise control over the direction and spread of the water flow. The term “eyeball” refers to the spherical or ball-shaped nozzle that can be rotated and angled in various directions to optimize water circulation. Eyeball inlets are commonly used because they offer flexibility in managing water currents within the pool, helping to prevent stagnant zones where debris and algae might accumulate. By directing the water flow, they improve the overall efficiency of the pool’s circulation system and enhance the distribution of chemicals throughout the water. Constructed from durable, corrosion-resistant materials such as plastic or PVC, eyeball inlets typically screw into the pool’s return piping system and can be adjusted manually. Their design helps maintain balanced water movement, which contributes to clearer water, better filtration, and improved swimmer comfort by reducing strong or uneven water jets. In summary, the swimming pool eyeball inlet is an adjustable, directional water return fitting that plays a key role in maintaining effective water circulation and overall pool hygiene.