The Filter-Flo is a dependable heavy duty siphon that extracts and filters shortening from fryers, in situations where there is no room for a built-in drain, or if your fryer has no built-in drain. A squeeze of the large bulb starts the flow which can empty a Mark II in a few minutes. A reusable cloth filter cleans as the liquid passes through. Note: the Filter-Flo requires a customer-supplied leak proof container for filtered shortening to pour into. Filter-Flo is not needed if you already have a shortening filter such as SF or EZMelt. Belshaw Adamatic Filter-Flo Siphon [DR42-1048] is perfect for your establishment.