For pumping applications where noise levels must be kept to a minimum, Gorman-Rupp offers a sound-attenuated engine-driven pump unit. Lockable doors prevent unauthorized personnel from tampering with the pump, fuel, engine or controls during unattended service. Fuel capacity allows for a minimum of 24 hours of continuous operation. All units feature a lightweight, corrosion-resistant aluminum enclosure that is acoustically treated to maintain noise levels as low as 63 dBa while operating at full load. Our environmentally engineered Silent Pump® units operate much quieter than current industry standards.