This 1.5HP Impeller fits a Jacuzzi Piranha 8 Stand Wet End Fixed Bracket Motor only and would be found on a motor that is about 15.6-16.0 Amps on a 115V motor or 7.8-9.0 Amps on a 230V motor..... It can be found under the Name Thera-Max or Thera-Flo on Sundance tubs and is also on Jacuzzi Premium J Series Tubs, I have seen these on some other brands too... You need to look at the face to determine if this is your Wet End.. There are many times that the word Jacuzzi or Sundance is cast into the wet end face coming down from the Pressure Side outlet..

Closed face impeller made for the Piranha series spa pump by Jacuzzi. Rated at 1.5hp, it is used in a Piranha pump body, and must be installed on a 1.5hp (or greater) thru bolt motor. Also used in Thera-Max and Thera-Flo pumps.

For Shaft seal options Click the below Links:

Jacuzzi Bracketless (8) Mount Piranha Pump Seal Parts Kit with Silicon

Jacuzzi Bracketless (8) Mount Piranha Pump Seal Parts Kit with Silicon & (1) Bearing

Jacuzzi Bracketless (8) Mount Piranha Pump Seal Parts Kit with Silicon & (2) Bearings 

Impeller Type    Closed Face
Impeller Diameter OD    3-5/8"
Vane Width ID    9/16"
Eye Diameter OD    2-3/16"
Eye Length    5/8"
Impeller Width OD    13/16"
Seal Seat Depth    1/16"
Shaft Length    2"
Shaft Diameter OD    11/16"
Seal Seat Diameter OD    1-9/16"
Manufacturer    Jacuzzi/Carvin
Pump Application    Fixed Bracket