Booster Pump

It was working fine until recently, so nothing has change in the plumbing. The pool has been somewhat unattended so I am concerned about plugging.

How do you check the impeller for clogging?
 
You can disconnect the piping and run a water hose backward through the pump (in the discharge and out the suction.) Look for any debris that becomes dislodged and flushes out the suction. If that doesn't work you'll have to look into the suction end and see if there's anything in there. An inspection mirror might make it easier.
 
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