Pressure-Side Pool Cleaners use pressure from the return side of your swimming pool’s filter system to move the pool cleaner around the pool. They work extremely well in areas where there is a lot of foliage. All debris is collected into the cleaner’s bag - not your filter, keeping your filtration system clean. These automatic pool cleaners plug into your return jet or use a separate booster pump. If you don’t have a booster pump built into your swimming pool, you can either purchase a booster pump or, purchase a pressure-side pool cleaner that does not require a booster pump.