No. A ball valve should not be partially closed to reduce the normal operating flow of an Aquascape PL or PN Series pump. Aquascape pump instructions state not to block or restrict the pump discharge.
If the pump is producing too much flow:
- Verify that the pump is properly sized for the pond or water feature.
- Consider using a smaller pump that is better matched to the required flow.
A ball valve can be installed as an isolation valve for servicing the pump or plumbing, but it should remain fully open during normal pump operation.
This applies to the Aquascape 3-PL2, 5-PL, 9-PL, 8-PN, and 12-PN pumps.