Sta Rite Dynamo High Performance Pump Model 351230SR

looking for the drain plug on this model and where to attache the connector to the aircompressor

Hello DebbieLazzaro - The drian plug for the Dynamo pump is part number TP4004PP.

If you want to connect the air compressor to the drain of the pump, you’ll need a 1/4" mpt hose fitting. This way you can thread it directly into the pump drain.