This Gecko Aqua Flow Circ-Master spa circulation pump has been used on Hydropool SelfClean Spas and Swim Spas, as well as other manufacturers since 2016.
This is a 1-speed circulation pump.
It has an external thread diameter of 61mm (1 1/2" connection), the water outlet is not in the middle but on the side of the pump.
H.P. 1/15, VOLTS 220, HZ 50, SPD 1