Polaris Vac-Sweep F6 3900 Sport F6 Pressure Side Pool Cleaner 31' Hose, 3 Jets, 2-1/2'' Vacuum Inlet delivers unmatched vacuum power, incomparable convenience, and legendary performance. The Polaris 3900 Sport combines the dynamic appeal of a completely re-engineered body design with the most sophisticated features, producing maximum vacuum power and drive torque. For quicker cleaning and fewer hang-ups. It features an all-wheel PosiDrive system with durable stainless steel drive chain that delivers 50% more torque. For maximum speed and performance, it is equipped with a dual-chamber zippered SuperBag that picks up and stores more debris, making cleaning easy and less frequent. It also features innovative auto-reverse technology, which enables it to free itself if it gets stuck. The Polaris 3900 Sport pressure cleaner works in all in-ground pools, and requires a booster pump. It supplements the pools filtration system by circulating an additional 40 gallons of water per minute through its filter bag. The 3900 Sport includes TailSweep PRO, an advanced sweep hose enhancement that blows debris out of corners and hard to reach places, while also keeping water from spraying outside the pool. No more wet windows or walkways.