Booster Pump not pumping any water when turned on!

Hi, bought a Wayne 1/2 HP booster pump for the Xero Pure. The water runs through the pump without any problem when I connect it and turn on the mains. But, the minute I turn on the pump, the water stops coming out of the pump completely! It’s as if something is shutting off the flow. Am I doing something wrong? I prime it before turning on the pump and the pump has electric power - I can hear it. I am working on a 220V electrical system and have used a step-down converter as this pump is 110V. I am desperate to get this working as I am not getting enough pressure for my Tucker boar’s hair brush with 3 jets and a rinse bar. I really need this for the windows I’m cleaning as they are practically opaque with built-up desert dust!

Any advice would be so much appreciated!

are you sure you have the connections right? it sounds like you have the input and output reversed

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I discovered the issue! The pipes were all connected properly; however, the inlet hose was too long. Shortened it and hey presto! Problem solved!

But thanks very much for the reply, @AdamPWC. It was actually a very easy thing to overlook. A case of couldn’t see the wood for the trees!