A sump pump runs constantly when its float is jammed in the up position, its check valve lets water drain back into the pit, groundwater keeps flowing in after storms, the pump is too small for the job, or the discharge pipe is blocked. Some nonstop running after a big storm is normal, but a pump that never rests on dry days has a problem.
Start by Listening and Watching
Stand near the pit and pay attention. Does the pump shut off and then start again a few seconds later? That often points to a bad check valve. Does it hum steadily while the water level barely changes? That suggests a clog, a weak pump, or a blocked discharge line. Does it run with the pit nearly empty? A stuck float is the likely cause.
Float Problems
The float has to move freely to tell the pump when to stop. Cords, debris, or the side of the pit can hold it up. With the pump unplugged, gently check that it rises and drops without catching. Do not reach into the pit while the pump has power.
Water Coming Back or Not Leaving
The check valve on the discharge pipe should only let water flow out. If it fails, the water you just pumped falls back in. Outside, make sure the discharge end is not buried, crushed, or clogged with leaves. If it empties too close to the foundation, water can soak back into the soil and return to the pit.
Is the Pump Big Enough?
In very wet conditions, a smaller pump may simply not keep up. A plumber can compare the pump’s capacity with how fast the pit fills.
A pump that never stops will wear out much sooner. Getting the pump and its check valve inspected can prevent a failure during the next storm. A busy pump is also a sign to check how water drains around your basement. Call JPR Plumbing at (833) 603-1840.