Goulds GT 15 to GT 20

Old 05-01-18, 10:53 PM
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Goulds GT 15 to GT 20


I have a Goulds GT 15 and would like to modify it to a GT20. Is this possible?

From what I have found the 15 and 20 have all the same parts except the impeller and the motor.


Is this the correct motor, AO Smith ST 1202? It is listed on the lockwell site as a replacement part for the GT 20 and the specs appear to match.


Thanks in advance for any assistance, it is greatly appreciated.
Old 05-02-18, 08:07 AM
Join Date: Nov 2007
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I'm not a pro but for what it's worth I concur with your interpretation of the parts diagram. It would appear that you can upgrade the 1.5HP pump to a 2HP by changing the impeller and motor only.

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