A flooded basement or walkout level raises one question before any other: where is the water coming from? A burst pipe, a failed appliance, seepage through the foundation, a sump pump that has quit and a backed-up drain can all look similar on the carpet. The answer changes who you call. We’re a referral service for burst pipes; we don’t have a local office, and an independent plumber confirms they can reach you.
Is it a pipe or groundwater?
- Close the main water valve. If the water keeps arriving, it isn’t from a supply pipe.
- Look at where it’s coming from. Water appearing along the base of a wall or at a floor crack after heavy rain points to groundwater. Water spraying or dripping from a pipe, a joint, a water heater or an appliance connection points to plumbing.
- Check the weather. Did it just rain hard or did the snow melt? Groundwater problems follow the weather. Pipe problems don’t.
- Check the sump pump, if you have one. Is it running, and is it discharging? A failed pump or a power outage during a storm is a common cause.
- Look at the floor drain and toilets. Water coming up from a drain means a sewer or drain problem, and that needs a different kind of plumbing service.
If it is a burst pipe
With the main closed, the usual next steps are the same as anywhere: keep clear of electrical outlets and appliances sitting in water, move what you can, and photograph the damage for your insurer. Lower levels often have a water heater, a laundry area and a bathroom or bar, and plenty of those connections are supply lines that can fail. The page on emergency burst pipe repair covers what the plumber does. If a leak is coming from inside a finished wall, see wall pipe leak repair.
Water damage doesn’t wait
Finished basements trap moisture in carpet, padding, drywall and insulation. Drying should begin within a day or two, ideally with a restoration company that can measure moisture, because surface-dry doesn’t mean dry. Whatever the source, don’t run a household vacuum on standing water, and stay out of the room if there’s any chance water is touching electrical equipment.
The same principle applies to hidden water in walls, which we discuss for Fallsmead. If it turns out to be a pipe problem, our main page for Potomac burst pipe help explains how to reach a plumber.
Questions people ask
The basement is wet but it didn’t rain. Is it a pipe?
Does a plumber handle a failed sump pump?
How soon should a wet basement be dried?
Burst pipe services you can ask for
Emergency Burst Pipe Repair
A split pipe or blown joint with water actively escaping.
Wall Pipe Leak Repair
Hidden leaks inside walls: damp drywall, stains, sound of running water.
Pipe Replacement / Repiping
Replacing worn-out or failing pipe, in part or the whole house.
A note on this guide. This page is general information, last reviewed October 2026. It can’t replace a plumber looking at your actual pipes, and Burst Pipe Fix Pros does not perform plumbing work.