1060 = no, no...
I had bad problems with my 1250 making 'cavitation' noises, it turns out it was drawing air in from around the inlet~housing,(rubber O~Ring), I only found out cause when I changed from a reservoir(not airtight) to a closed loop it started leaking water(very slightly), I guess it did'nt need to with the res?, air'd get drawn in and leave through the res?, but with the loop closed it had to loose some water to replace the space the air was taking?. I don't know that's my guess though. this was a new pump, it was probably just a bad seating...
You could try gluing the impellor if it's loose on the shaft/magnet~rotor...
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