The pond pump is working with me all year in the garden pond. Unfortunately, their ability to function is finished after almost two years and a new same pump was purchased. Disassembly of the pump revealed: The bore of the hollow shaft rotor is due to imbalance so knocked out that the rotor drags in the housing and is therefore inhibited to a standstill. I would love to ( [email protected] ) A discarded complete Xtra 1600 buy very cheap to perform well because similar studies.