1.5 HP RPM 3450. Shaft Threads - 1/2-20 UNF-2A. Shaft seal failure is the major cause of motor failure. If you have any questions or concerns, or do not see an item that you would like, please do not.With over 30 years experience in the Florida pool industry, we are experts when it comes to pool parts advice and customer service. Thank you for choosing Positive Pool Wholesale Supply. The item "Emerson US Motors AST165 1.5 HP Pool Pump Motor Hayward Motor UST1152" is in sale since Wednesday, October 12, 2016. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Pumps". The seller is "positivepoolwholesale" and is located in Florida. This item can be shipped to United States.