My Sump Pump Is Gurgling and Splashing All Night: Why & What to Do
A sump pump that gurgles or splashes all night usually means groundwater is actively entering the pit, or the check valve is letting water fall back down the discharge pipe between cycles. It's rarely an emergency, but it means the pump is working harder than normal. Check the pit and the check valve before you lose more sleep over it.
Frequently asked questions
Will the gurgling sound go away on its own?+
Often yes, if the noise is tied to recent rain and groundwater levels drop within a few days. But if the check valve is faulty, the noise will return with every cycle until it's replaced.
How many times a day should a sump pump normally cycle?+
Under normal conditions, a few times a day during dry periods, and more often after rain. More than 10-15 cycles per hour sustained suggests an infiltration issue or an undersized pump.
Can I replace the check valve myself?+
It's a relatively simple repair for someone comfortable with basic plumbing, but an improper installation can cause the pump to fail entirely. If you're unsure, a plumber can do it in under an hour.
Should I worry about a power outage if my sump pump is working hard?+
Yes, if your area is receiving a lot of water and the power goes out, the pump stops and the pit can overflow quickly. A battery backup or a backup pump is good protection in these conditions.
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By Julien Fortin — RBQ-licensed plumber, 10 years of experience in residential plumbing
Updated on July 24, 2026