Sand Pumps Are One Of The Most Popular Methods Of Keeping Pool Water Clean . They Are Not Only Effective In Operation But Also Save Money And Time Because The Sand Only Needs To Be Replaced Once Every Five Years . This Fact Makes The Filter System The Easiest To Maintain . The Efficiency Of 3785 Liters Per Hour Will Work Well With Medium-Sized Tanks . The Affordable Price Is An Important Advantage, Which, Given The Durability Of The Product , Makes It Available To Every Budget . The Pump Is Controlled By A 6-Stage Control Valve , Which Has The Following Functions: Filtering, Rinsing, Washing, Recirculation, Discharge And Shutdown. Detailed Recommendations Can Be Found In The Attached Pump Instructions.