This is a spare stator with joiner for Tuhorse 4" 1000W screw solar pumps.
The 4" 500W screw rotor is different size to 4"1000W screw rotor..
Buy two of this rotors cost $240 include postage.
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The rubber flange of the stator failed after about 4 months in service. I think the 4 screws that hold the top of the pump and hence the stator in place came loose. They are IMO too small. Reinstalled with longer screws and spring washers. Good service from Bobbie. He sent an extra rotor and stator. So far so good. The 100mm pump serves a nearby Turkey's nest and then pumps 2km to twin tanks.
doing well at the moment. Service was great