Pump runs at reduced output — Possible valve restriction or air in system

What does Pump runs at reduced output mean?

The pump is operating but not delivering its full capacity, which could be due to a partially closed valve or air trapped in the system.

• Stop valve on the pressure side is throttled (partially closed).
• Air in the suction line.
• Clogged filter on the suction side.

Click steps to track your progress.

1. 1

   Slowly open the stop valve on the pressure side.

2. 2

   Check the suction line for leaks and vent the pump.

3. 3

   Clean or replace the filter on the suction side if it is dirty.

4. 4

   If leaks are visible at flanges, repair them.