Sump pump maintenance

Why sump pumps matter here

Colorado Springs is dry most of the year, which is exactly why sump pumps get ignored. Then the late-summer monsoon pattern arrives, a storm dumps an inch of rain in half an hour, and the ground around the foundation saturates faster than it can drain.

A sump pump that has not run since spring is being asked to start, run continuously, and keep up — all at once. That is the moment a stuck float or a clogged discharge line shows itself.

The quarterly test

Lifting the float by hand is not a test. It proves the switch moves and nothing else. Fill the pit with water instead, so the pump has to sense the rise, start, move real volume and shut off on its own.

• Pour five gallons into the pit — a bucket at a time, slowly, until the float rises.
• Confirm it starts promptly and does not hesitate, hum or trip the breaker.
• Listen for the discharge — you should hear water moving out, not just the motor spinning.
• Watch it shut off at the low level and stay off. A pump that short-cycles has a float or check-valve problem.
• Check the outlet outside and confirm water is actually leaving the house.

Clearing the pit

Pits collect what the perimeter drain brings them — silt, gravel fines, and in finished basements, drywall dust and construction debris. That sediment packs around the inlet screen and jams floats.

Unplug the pump, lift it out, and scoop the bottom of the pit clean. Rinse the inlet screen. While the pump is out, look at the pit walls for cracks and at the drain tile inlets for blockage. Put the pump back flat on the pit floor, not tilted against a wall — a tilted pump makes the float bind.

Check valve and discharge line

The check valve on the discharge pipe keeps water from falling back into the pit when the pump stops. When it fails, the pump refills its own pit and cycles over and over until the motor burns out. A rapid on-off-on pattern after the pump shuts down is the tell.

Outside, the discharge needs to end well away from the foundation — ten feet or more, onto ground that slopes away. A line that dumps at the foundation wall just sends the same water back to the pit. Keep the outlet clear of mulch, leaves and landscape fabric.

The Colorado freeze problem

This is the one most homeowners miss. A discharge line that runs above grade, or one with a low spot, will hold water after a fall storm. Once the first hard freeze arrives in early-to-mid October, that water turns to ice and plugs the line. The pump then runs against a closed pipe.

Before winter, confirm the line drains completely after a cycle, check that any above-grade section is pitched continuously downhill, and clear the outlet. If your discharge regularly ices up, the line routing needs changing — that is a job worth getting a plumber's eyes on.

Battery backup

Storms and power outages arrive together. A primary pump with no backup is a pump that stops working at the exact moment you need it. If you have a backup system, it needs its own attention:

• Unplug the primary pump and run a pit test on the backup alone.
• Check battery terminals for corrosion and confirm the charger shows a good state.
• Check fluid level if the battery is a serviceable type.
• Replace the battery on the manufacturer's schedule — batteries age out whether or not the pump ever runs.

Signs the pump is near the end

Pumps do not usually fail silently. Grinding or rattling, visible rust on the housing, vibration that was not there last year, running longer than it used to for the same amount of water, or a motor that gets hot and trips thermal protection are all worth acting on before the next storm.

What a licensed plumber does that you can't

A homeowner test tells you the pump runs. It does not tell you whether it runs correctly. A licensed plumber measures actual flow rate against the pump's rating to see how much capacity has been lost, checks amp draw to catch a motor that is working harder than it should, and verifies the pump is sized for the water your pit actually takes on.

They also inspect the discharge routing against code, confirm the pit is sealed and vented properly where radon is a concern — and El Paso County sits in a high radon-potential zone — and evaluate whether the perimeter drain feeding the pit is still doing its job. If the pump is cycling constantly, the real problem is usually grading or drainage outside, and that diagnosis takes experience with local soils.

Electrical work on the dedicated circuit, replacing a failed pump, and any change to the discharge piping all belong with a licensed trade. If your basement has flooded before, ask about emergency coverage too — storm damage does not wait for business hours.

Frequently asked questions