Many people say that the built-in pump is not good, and the external pump is good. The biggest argument is that the external pump motor is convenient for maintenance. Does that also indicate another problem: the external pump is prone to failure. In addition, the motor is the core of a pump. If the motor is not well done and needs to be repaired all the time, it can only mean that it is a failed pump. The reason why some manufacturers make built-in, and some manufacturers do external, there are different considerations. I believe that no matter which way the motor is placed, quality is the foundation of everything. If your quality is good, it is a good pump. What does it have to do with the internal and external placement of your motor? Here’s the difference between the two:

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