SERVICE GUIDE

Crawl space sump pumps.

Compare installation and replacement plans, including the basin, discharge route, backup power and upkeep.

Start with the whole system.

A sump pump lifts collected water from a basin into a discharge pipe. Before buying one, ask how water will reach that basin and where it will go afterward. A pump does not repair a plumbing leak or replace humidity control.

For a first installation, ask why pumping is needed and whether exterior corrections or a suitable gravity outlet could address the problem. Our drainage-options guide explains that earlier decision. This checklist focuses on the equipment and responsibilities once a pump is being considered.

PNNL’s sump-pump guidance connects the collection drain, basin and discharge, and explains why water released too close to the foundation can return.

BEFORE THE VISIT

Bring a short problem record.

When water or alarms appear, including whether rain or a power outage was involved.
Photos already available, the pump model and installation date if known, and past service records.
What changed: a new noise, repeated cycling, an alarm, or water remaining despite pump operation.

These observations help the inspector; they do not diagnose the fault. Use the water-after-rain guide if that is the pattern. Do not enter standing water or reach into electrical equipment to collect information.

Replacing a pump? Ask what failed.

Ask the contractor to inspect the intake, float, basin, incoming drainage and discharge route before treating a new pump as the complete repair. SDSU Extension distinguishes pump faults from plugged, damaged or poorly designed drainage and identifies the outlet, intake and switch as operating checks.

Request a written finding: which component failed, what will be reused, what will be replaced and how the repaired system will be tested. If water is arriving faster than the system can move it, ask whether the collection route, discharge arrangement or equipment selection needs reassessment. A replacement model number alone leaves those questions open.

Get four answers in writing.

1. What is being installed?

List the pump model, basin, float control, check valve, cover and service access. Ask how the installer selected capacity for the expected water flow and discharge lift, rather than comparing horsepower alone.

Identify who handles electrical work, any required permits and restoration of disturbed areas. The federal Standard Work Specifications call for a pump matched to the home’s flow needs, manufacturer-directed installation and verification of safe operation.

2. Where does the water end up?

Request a sketch of the discharge pipe and final outlet. Ask who checks local requirements and how the route avoids water returning toward the house or causing problems for neighboring property.

Ask which parts can be inspected or cleared, and how freezing, clogging or damage would be recognized. “Discharge outside” does not define a complete route.

3. What happens during a failure?

Ask separately about loss of electricity and failure of the primary pump. A second electric pump sharing the failed supply will also stop, as Government of Canada guidance explains.

For a proposed backup, request its capacity, power source, maintenance needs and the assumptions behind any runtime estimate. If an alarm is included, ask who hears or receives it, how it works during an outage and how to test it. Record the service contact and response arrangements.

4. What will the handover include?

Ask for an operating demonstration of the pump and float, plus any installed backup and alarm. Keep the manuals, installation photos, warranty terms and discharge sketch together.

Have the installer explain safe owner checks, tasks needing a technician and the manufacturer’s maintenance schedule. Confirm how equipment remains accessible after liner or insulation work. A successful test demonstrates operation under those test conditions; agree on follow-up if water remains after rain.

When comparing prices, separate an equipment-only replacement from work on drainage, discharge, electrical supply and backup. Use the quote-comparison guide and worksheet to keep required exclusions and ongoing service costs visible.

Reviewed October 4, 2026. These are homeowner planning questions, not installation instructions or a property-specific design. The primary sources linked above explain system principles; the inspected site, equipment instructions and applicable local requirements determine the work.

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