The Super Transfer Pump with Pre-Filter is a self-priming pump with an automatic shutoff switch as 45 psi. It makes transferring your wine a breeze because it does all the work for you. All of your fermentation equipment can be on the same level now because the pump will move the wine up, down, or wherever you want it to go. The pre-filter helps prevent large sediment from getting into the pump and damaging the motor. This pump also offers an adjustable flow rate for those times when you might need more, or less, power. This unit pumps at a rate of 3.0 gallons per minute maximum, and it can run without interruption for over 90 minutes.