How to Test a Sump Pump
To test a sump pump properly, know that lifting the float and hearing the motor hum only proves the motor runs. It does not prove the system moves water out of the building.
Do it yourself, safely
Basement and foundation how-to guides
Basement and foundation how-to guides are practical checks a homeowner can genuinely carry out: no special tools, no unsafe spaces. Each one tells you what the result actually means and when it is time to stop and call someone.
6 step-by-step guides
Basement how-to guides: check it yourself first
How to Tell Condensation From Seepage
Condensation and seepage both leave a wet wall. One is fixed with dehumidification and insulation, the other with drainage and waterproofing. Guessing wrong is expensive.
How to Monitor a Foundation Crack
Almost every foundation has a crack. What matters is whether it is changing, and memory is a poor instrument for that.
How to Prepare for a Foundation Inspection
An hour spent preparing for a foundation inspection changes what an inspector can actually see, and turns a sales visit into a diagnosis.
How to Winterize a Sump Discharge Line
A frozen discharge disables every pump on the system, backup included. It is the most preventable basement flood there is.
How to Document Basement Water
To document basement water for a claim, act before cleanup, because cleanup removes the proof. Ten minutes of recording during the event is worth more than any recollection afterwards.
At a glance
The guides compared by time and supplies
| Guide | Time needed | Supplies |
|---|---|---|
| How to Test a Sump Pump | About 20 minutes | A bucket or hose, A flashlight, A phone to photograph the pit and outlet |
| How to Tell Condensation From Seepage | Two days, mostly waiting | A square of aluminium foil or clear plastic, roughly 12 by 12 inches, Strong tape that will hold on masonry, A hygrometer to measure humidity, A towel to dry the test area |
| How to Monitor a Foundation Crack | 15 minutes, then a few minutes each season | A pencil, A crack gauge, calipers or a steel rule with fine graduations, A camera or phone, A notebook or a note on your phone |
| How to Prepare for a Foundation Inspection | About two hours, spread over a few days | A phone camera, A notebook, A tape measure, A flashlight |
| How to Winterize a Sump Discharge Line | About 45 minutes in autumn, then brief winter checks | A garden marker, stake or flag, A flashlight, Gloves, A bucket of water for testing |
| How to Document Basement Water | About 30 minutes during the event | A phone camera, A tape measure or ruler for scale, A notebook, A torch |
Sources and Vermont specifics
Safety, tools and numbers behind the six guides
Most of the homeowner checks in these guides need very little equipment. A humidity meter costs roughly ten to fifty dollars according to the EPA, which advises keeping indoor humidity below 60 percent, ideally between 30 and 50 percent. The same guidance says to dry water-damaged areas within 24 to 48 hours, so the documentation guide asks you to record the event while it is happening and not after cleanup.
Two limits apply to every guide. Do not stand in water where cords, outlets, a furnace or the panel are involved. And do not treat a test as a diagnosis. The Vermont Department of Health notes that short-term radon testing may be done in a basement that will be used as living space, and that homes should be retested every five years or after significant changes to the structure or mechanical systems, so schedule that test separately from any water work.
Build a small kit before you need it: a phone with a working camera, a tape measure, a flashlight, a pencil, a notebook and a humidity meter. Keep them together. Water events rarely wait for a convenient day, and the value of a record depends on how quickly you start it. Date every photograph, write the time on the first page of the notebook and keep a running list of what you moved and what you left in place.
Then set a calendar. Test the sump in early spring and again in fall, walk the discharge line before the first freeze, read the humidity meter once a month, and measure any crack you are monitoring at the same time each season. None of it takes long, and together the entries make the case for or against a repair when someone eventually asks you to prove what changed and when.
When a guide says to call a professional, take that seriously. Standing water near electricity, a wall that has moved since the last measurement, a musty smell that persists after drying and a discharge line that will not drain are all cases where a homeowner's test has done its job and a specialist should take over. Bring your record, and the visit will be shorter and more useful.
If a guide asks you to measure something, write the number down. Memory turns thirty-one into about thirty and a week into a few days, and those differences matter when a professional tries to interpret a trend. A page of dated numbers is one of the most valuable things a homeowner can bring.
Sources: EPA, A Brief Guide to Mold, Moisture and Your Home; Vermont Department of Health, Radon. Checked September 26, 2026.