Balboa Water Group Ultimax impeller for 2.0 hp spa pumps. This closed-face impeller is designed for the Ultimax pump wet end and must be installed on a 2.0 hp (or greater) thru-bolt motor. The part is listed as discontinued by the manufacturer, so timely replacement is important for ongoing service schedules.
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Impeller type: Closed-face
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Diameter (OD): 4-1/16 in
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Vane width (ID): 1/2 in
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Eye diameter (OD): 2-1/4 in
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Eye length: 3/8 in
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Impeller thickness (OD): 1 in
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Seal seat depth: 5/16 in
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Shaft length: 2 in
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Shaft diameter (OD): 11/16 in
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Seal seat diameter (OD): 1-5/16 in
Ideal for spa maintenance under Balboa and Vico Ultimax configurations, this impeller helps preserve pump performance by maintaining optimal flow and pressure for circulating water and jet functions. It supports reliable operation when replacing worn components in Ultimax systems that require a 2.0 hp thru-bolt motor, aligning with Balboa’s trusted engineering for spa reliability.
| Impeller Type |
Closed Face |
| Impeller Diameter OD |
4-1/16" |
| Vane Width ID |
1/2" |
| Eye Diameter OD |
2-1/4" |
| Eye Length |
3/8" |
| Impeller Thickness OD |
1" |
| Seal Seat Depth |
5/16" |
| Shaft Length |
2" |
| Shaft Diameter OD |
11/16" |
| Seal Seat Diameter OD |
1-5/16" |
| Manufacturer |
Vico/Balboa |
| Pump Application |
Ultimax |
