If your pit is not sealed you can reach down in the pit and manually activate the switch. You can also pour buckets of water into the pit to simulate water entering the pit. Testing the amp draw with a voltmeter is also a good idea. Checking your battery backup system should also be done. There may be a "test" button on your battery backup system that you can press. Batteries should be replaced every 3 years. While nobody knows exactly when a pump will fail a good rule of thumb is any pump over 6-8 years old should be replaced. -S and J Plumbing
Poor into the pit until the switch activates. If not, buy a new one at Home Depot or Menards. Don't go cheap.
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