Grundfos JP5 Capacitor
The Grundfos JP5 is a 0.78 kW single-phase jet pressure pump commonly found in well & domestic pumps setups. Its motor runs on a 20µF 450V motor-run capacitor in a CBB60-style can: here's the exact replacement and how to confirm it.
- Pump type
- jet pressure pump
- Motor
- 0.78 kW · single-phase
- Run capacitor
- 20µF · 450V · CBB60
- Tolerance
- ±5%
- Application
- Well & domestic pumps
- Also sold as
- JP5, JP 5, JP5-B
- Fitment source
- Manufacturer-documented
The Grundfos JP5 jet pressure pump uses a 20µF 450V motor-run capacitor (CBB60-style): it's the part that helps the single-phase motor start and keep running smoothly. We source this value from manufacturer / supplier documentation. Match the replacement to 20µF (about 18-22µF) at 450V or higher; the checklist below covers how to confirm it against your own capacitor.
How to be sure you get the right one
- µF must match: the JP5 needs 20µF (about 18-22µF), within ±5% of the label. Too low and the motor won't start; too high and it runs hot.
- Voltage can go up, never down: a 450V (or higher) cap is correct here; a 450V part safely replaces a 370V or 440V one. Don't fit below 450V.
- Check the terminal + size: make sure the new cap physically fits the housing and the connections match (or use a spade adapter).
- When in doubt, read your old cap: the printed µF and voltage on the part you're replacing is the final word.
Service parts for the Grundfos JP5
The seal, capacitor and bearings for this pump, on their own or as a kit. Check the old part before fitting.
- Grundfos JP5 Mechanical Seal $49.95
Common questions - Grundfos JP5 capacitor
What capacitor does the Grundfos JP5 use?
A 20µF 450V motor-run capacitor (CBB60-style). Always confirm against the rating printed on your existing capacitor before ordering.
Can I fit a higher-voltage capacitor in the Grundfos JP5?
Yes, voltage can be equal or higher, never lower. A capacitor rated 450V or above is fine (450V is the usual choice), as long as the µF still matches (20µF).
Other Grundfos pump capacitors
Replacing the capacitor on a different Grundfos? These models have a confirmed or documented fitment too:
Browsing rather than replacing? All well & domestic pumps capacitors · Pump capacitor guide
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