The Secrets of Quiet This pump is very silent. If you store it under a cabinet, you can hardly hear it. Quiet secrets are as below: * Magnetic bearings reduce the motor vibration and noise to the least. * Sound insulation stainless steel inner case covers the motor. * Motor is fixed to the bottom case with 4 durable rubber columns. * The bottom case has 4 rubber shockproof feet. * Rubber buffer pads are along the case gaps.