You need the following, which you can find on the Pump Plate:
1. Horsepower (hp) or Kilowatt (kw) This controls the pressure of the water coming out. The more jets you have the more hp or kw you will need.
2. Speed will depend on how many levels of jet power the spa has. If using the same pump for circulation & jet power, you will need a 2-speed pump that you can set at a low level to circulate the water when spa is not in use.
3. Connection - amp or jj plug.