Operation of three phase motor on single phase supply

[Refugee]

Why wouldn't it be primed?
The Impeller normally sits in the Suds.

Alan

There should be enough air space above the impeller in the pipe for the motor to start before it starts lifting the suds up to the tool.
A short bit of wide pipe could also be added if needed as long as the tank has the capacity to provide it before the pump starts lifting the suds.