Sump Pump Basics: What It Does and When It Fails

Many homes in Celina and surrounding North Texas communities have sump pumps installed in basements, crawlspaces, or utility areas. If you have one, understanding what it does and how to know when it's working — and when it isn't — can prevent a significant water damage situation.

What a Sump Pump Does

A sump pump sits in a sump pit — a hole dug in the lowest point of your basement or crawlspace floor. When groundwater or surface water seeps into this pit and reaches a set level, a float switch activates the pump, which ejects the water through a discharge pipe to a location away from the foundation (typically a storm drain, dry well, or to daylight in the yard).

Without a functioning sump pump, water that accumulates in or around the foundation can flood the lower level of your home, creating water damage and mold conditions. In North Texas, where intense rain events — including thunderstorms and flash flooding — are common, a functioning sump pump is important protection for homes in areas with high water table or significant runoff.

Testing Your Sump Pump

You should test your sump pump before storm season and periodically throughout the year. The easiest method: pour a bucket of water slowly into the sump pit until the float switch activates and the pump turns on. Watch the water level drop as the pump runs. The pump should activate promptly, run continuously until the pit is drained, and then shut off cleanly.

Signs that something is wrong during this test:

• The pump doesn't activate when the float rises
• The pump runs but the water level doesn't drop (pump not moving water effectively)
• The pump runs continuously without shutting off
• The pump makes grinding or unusual noises
• The pump activates but the discharge pipe appears to have no flow outside

Common Sump Pump Failure Modes

Float Switch Failure

The float switch is the most common failure point. If the float gets stuck in the down position, the pump won't activate when water rises. If it gets stuck in the up position, the pump may run continuously and burn out. In some cases, the float moves freely but the switch inside has failed.

Motor Failure

Sump pump motors do wear out. A pump that runs intermittently but doesn't pump water, or a pump that hums without running, may have a failed motor. Motor burnout can also result from the pump running dry, from a stuck impeller, or from years of normal wear.

Clogged or Frozen Discharge Line

The discharge line that carries water away from the pump can become clogged with debris or, in North Texas winters, freeze solid during hard freezes. A blocked discharge line causes the pump to run without relieving water, leading to motor burnout. Check that the discharge line's exterior termination point is unobstructed and, in freezing weather, monitor it for ice formation.

Loss of Power

Sump pumps require electricity. In a storm — exactly when you most need the pump — power outages are common. Battery backup sump pumps provide protection during power outages. If your home has a sump pump and no battery backup, consider adding one before the next storm season.

Sump Pump Lifespan

Most sump pumps last 7–10 years under normal use. If yours is approaching this age, or if it has been running frequently due to high water table conditions, proactive replacement before failure is worth considering. A pump that fails during a storm cannot be replaced quickly — and the damage from a flooded basement can far exceed the cost of a new pump.

We install and service sump pumps across Celina and North Texas. Call +1 (972) 544-6460 for sump pump repair, replacement, or inspection.