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What is the difference between the Gast AT05-101-G215DX and the AT05-520-G215DX? Also, Do you sell enclosures to protect a rotary vane pump from the weather?
The only difrenceis a the motor might have been tweaked in one way or another there is no change to the design, output, or H.P.
does this come in a 1/2HP?
No the 1/4hp motor is specfice to the Gast AT05 it never came in 1/2HP. There are other models Gast makes but in the 23 series there is no 1/2HP models.