GiantZ Peripheral Water Pump QB60

Brought the pump with auto control unit, for a 5000ltr water tank to water the garden. The auto controller hit the top of the pump before it tightened ,so had to put an extension in, thread tape was of no help due to sloppy threads, then when I popped out the water intake plug to connectit to the tank, the intake was full of metal scarf and oil, so it will go straight through the impeller and whole system when started. Very poor quality product, doomed to fail due to the contamination at manufacturing. Do not recommend