Nutritower Replacement Pump

Pump isn't sized properly, I am now onto my third pump as the other two have burnt out and there is low pressure. I have already disassembled the nutri tower. Cleaned the tubing once, and fully replaced the tubing a second time. I feel like there is a pump issue, whether it is working to hard or it isn't good quality. Would recommend based on my experience sourcing a new type of pump

replacement pump

i haven't used it yet I'm not sure how long the old one will last