Pressure-side vacuums are a type of pool cleaning system that use water pressure to remove debris from the pool floor and walls. They connect to the pool's return line, which pushes water through the vacuum, creating suction that collects dirt and leaves. This method is effective for cleaning larger debris and is often used in residential pools. These vacuums are typically equipped with a filter bag to capture the debris they collect. Unlike suction-side vacuums, which rely on the pool's filtration system, pressure-side vacuums can operate independently, making them a convenient option for pool maintenance.