I also forgot to mention, another reason I selected the Tsunami's over the JABSCO pumps was the AMP draw. The JABSCO pumps draw about 9 amps per pump x 3 = 27 amps. Tsunami 800's use 1.8 amps per pump x 3 = 5.5. You are using less amps with all 3 tsunamis running than one JABSCO pump. This is significant, especially if you are draining/filling without the boat running.