Key takeaways
- Water from a washer travels. It can soak the floor upstairs, the insulation between floors, and the ceiling below before you see a drip.
- When it leaked tells you a lot. A leak while the washer was off points to the supply hoses or valves. A leak during draining points to the drain hose or the drain pipe.
- Washer overflow isn’t clean water. Public health guidance treats it as gray water, so wear gloves and don’t wait to dry it out.
Words you’ll see
- Supply hoses
- The two hoses that bring hot and cold water from the wall to the washer.
- Shutoff valves
- The two valves, usually on the wall behind the washer, that turn the water to the washer on and off.
- Drain hose
- The hose that carries used water out of the washer during the drain and spin cycles.
- Standpipe
- The open pipe in the wall that the drain hose hooks into. If it’s clogged, it can overflow.
- Gray water
- A term for water that’s somewhat dirty and may make people sick, like water from a washing machine.
- Subfloor
- The wood layer under the laundry room floor. The ceiling of the room below is attached to the underside of the same floor joists.
On this page
Upstairs: stop the water
Most washers have two shutoff valves on the wall behind the machine: one for hot water and one for cold. Turning both of them off stops new water from reaching the washer.
- 1
Close both valves behind the washer
Turn round handles clockwise until they stop. If you have levers, turn them a quarter turn so they sit crosswise to the pipe. If the valve is the part that’s leaking, or it won’t turn, don’t force it. Close your home’s main water valve instead.
- 2
Deal with the power safely
Unplug the washer only if the plug, the outlet, and the floor where you’re standing are dry. If water has reached the outlet or the floor around it, don’t touch the plug. Turn off the circuit at the breaker panel instead, but only if you can reach the panel from dry ground. If water is near the panel, stay away from it and call an electrician or Idaho Power.
- 3
Stop using the drains if water came up the drain pipe
If water spilled out of the drain pipe behind the washer, a clog may be the cause. Hold off on running sinks, showers, and the dishwasher until you know. If dirty water is also coming up in a tub, shower, or floor drain, the problem may be your main sewer line. See our guide to sewer backups.
Once the water is off, soak up what you can on the laundry room floor. The less water that sits there, the less soaks down into the ceiling below.
Downstairs: protect the room below
- Keep away from wet lights and fans. Don’t flip the switch for a light that’s dripping. The Electrical Safety Foundation International warns that electrical equipment that got wet can stay a shock and fire risk even after it dries. Turn off that circuit at the breaker if you can reach the panel from dry ground, and have an electrician check it before you use it again.
- Catch the water. If the ceiling isn’t sagging, put buckets under the drips and towels on the floor around them.
- Move your things. Get furniture, rugs, electronics, and anything paper or fabric out of the way.
- Take photos before you clean up. Get the ceiling, the floor, and anything that got wet.
For more on stains, drips, and sagging spots, see our guide to water coming through the ceiling.
Where the water came from
Knowing the cause helps you call the right person, and it matters for insurance. The timing is your best clue.
Supply hoses are a big one. The Connecticut Insurance Department, citing an insurance industry study, says a burst water supply line caused half of all water damage incidents involving washing machines. On the drain side, This Old House says the most common reason for a drain overflow is a blockage in the drain hose or standpipe.
Roto-Rooter lists clogged drain lines, damaged hoses, faulty inlet valves, overloading, and too much or the wrong detergent as common reasons a washer overflows.
Is washer water clean? Drying and mold
Not quite. Massachusetts’ public health guidance lists washing machine overflow as Category 2, or gray water, which can contain contamination that may cause illness. Wear rubber gloves when you clean up, and wash your hands afterward.
Time matters too. The EPA says to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth. The Massachusetts guidance adds that wallboard that hasn’t dried well within 48 hours should be cut out and thrown away.
- Pull up wet rugs and move them somewhere they can dry.
- Run fans and a dehumidifier in both rooms if it’s safe to use power there.
- Don’t paint over a water stain until you know the ceiling is dry.
- Watch for a musty smell, new stains, or spots that keep spreading.
Who to call
A plumber or appliance tech fixes what leaked. A restoration crew deals with the house: removing water, drying the floor, ceiling, and insulation, and taking out materials that can’t be saved.
Does insurance cover a washer leak?
Often, the water damage is covered when the leak was sudden, like a hose that burst. Slow leaks and worn-out parts are a different story. Your own policy has the final word.
The NAIC explains that homeowners policies generally cover damage from a sudden and accidental discharge of water. Washington State’s insurance commissioner adds that most policies don’t cover gradual leaks, because insurers usually treat them as maintenance problems. The Idaho Department of Insurance has tips on filing a home claim.
In a condo or townhome? If the water came from a neighbor’s washer, or from your washer into a neighbor’s unit, more than one policy may be involved. Amica suggests calling your own insurer first, then letting your condo association know, getting a copy of the bylaws or master policy for your insurer, and contacting the neighbor if they’re involved.
For the full process, see our guide to water damage insurance claims in Idaho.
Preventing the next leak
The Connecticut Insurance Department offers these tips:
- Check the supply hoses every 6 months for cracks, kinks, or blisters, especially near the ends.
- Replace the hoses every 5 years, as washer makers recommend.
- Consider braided stainless steel hoses.
- Turn the supply valves off when you’re not using the washer.
- Don’t run the washer when no one is home.
It also helps to keep the drain hose firmly hooked into the standpipe so it can’t pop out during the spin cycle.
Frequently asked questions
Can a wet ceiling dry out on its own?
A small, quick leak sometimes can, especially with fans and a dehumidifier. But water often soaks into the insulation and sits on top of the drywall, where it dries slowly. If the ceiling is sagging, the stain keeps growing, or it’s still wet after a day or two, have it checked with a moisture meter. Drywall that hasn’t dried within 48 hours may need to be cut out.
Will homeowners insurance pay for a new washing machine?
Usually not just because it wore out. Policies often cover sudden water damage to your home, but not the cost of replacing the worn part that caused it. Check your policy and ask your insurer.
My upstairs neighbor’s washer leaked into my condo. Whose insurance pays?
It depends on where the leak started and what your policies say. Report it to your own insurer and your condo association right away, and let your neighbor know. Your insurer can sort out whether another policy should pay.
A washer leak through the ceiling is stressful, but it’s fixable. You don’t have to sort it out alone.
Call if the ceiling, floor, or insulation got soaked, and we’ll try to connect you with an independent water damage provider near you. For a leaky hose or valve with no damage, a plumber is the right call.
Read next
Related guides
Sources (checked November 10, 2026)
- Connecticut Insurance Department, “Water Damage” pamphlet (citing the Institute for Business & Home Safety): https://portal.ct.gov/cid/-/media/cid/waterdamagepamphletctdoipdf.pdf
- This Old House, “How to Fix Washing Machine Drain Overflows”: https://www.thisoldhouse.com/plumbing/reviews/how-to-fix-washing-machine-drain-overflows
- Roto-Rooter, “How to Prevent Washing Machine Flooding at Home”: https://www.rotorooter.com/blog/flooding/how-to-prevent-your-washing-machine-from-flooding/
- Massachusetts Department of Public Health, “Quick Reference: Water Damage Response in Buildings”: https://www.mass.gov/doc/quick-reference-water-damage-response-in-buildings-0/download
- US EPA, “A Brief Guide to Mold, Moisture and Your Home”: https://www.epa.gov/mold/brief-guide-mold-moisture-and-your-home
- Electrical Safety Foundation International, “Water-Damaged Electrical Equipment”: https://www.esfi.org/water-damaged-electrical-equipment/
- NAIC, “Will My Homeowners Insurance Policy Cover Water Damage From a Burst Pipe?”: https://content.naic.org/article/will-my-homeowners-insurance-policy-cover-water-damage-burst-pipe
- Washington State Office of the Insurance Commissioner, “Leaks, water damage, and mold”: https://www.insurance.wa.gov/insurance-resources/home-insurance/how-home-insurance-works/leaks-water-damage-and-mold
- Idaho Department of Insurance, “Home & Renters Claims”: https://doi.idaho.gov/consumers/home-renters-insurance/home-renters-claims/
- Amica, “Condo vs. Homeowners Insurance”: https://www.amica.com/en/resources/home/condo/condo-vs-homeowners-insurance.html
Update log
- November 10, 2026: First published.


