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How Do I Fix a Leak in My Laundry Room?

Last updated October 28, 2026

The short answer

Stop the Water First

The first step is to stop the flow of water. Locate the shutoff valves behind the washing machine and turn them clockwise to close. If the leak is from a supply line, this stops the pressure. If you cannot find the valves or they are stuck, turn off the main water valve for your home.

Unplug the washing machine to avoid any electrical hazard. Move the machine away from the wall if you can, but be careful of wet floors. Place towels or a bucket under the leak to catch drips while you inspect. Acting quickly limits damage to flooring and walls.

Inspect the Usual Suspects

Check the water supply hoses for cracks, bulges, or loose connections. Tighten the fittings with a wrench, but do not overtighten. Look at the drain hose where it connects to the standpipe or sink; a loose clamp or a hole can cause water to spill. Also check the washing machine door seal if you have a front loader.

If the leak comes from the floor or wall, it may be a pipe issue. Feel along the floor for dampness and look for water stains on the wall. A slow drip can go unnoticed for days, so use a flashlight to inspect dark corners. If you find no obvious source, the problem might be inside the wall or subfloor.

  • Check supply hoses for cracks or bulges
  • Tighten loose connections with a wrench
  • Inspect the drain hose for holes or clamps
  • Look for dampness on the floor and walls
  • Feel the wall for wet spots behind the machine

Dry Everything Thoroughly

Once the leak is stopped, dry the area as much as possible. Use towels to soak up standing water, then run a fan or dehumidifier to speed up drying. Pay attention to baseboards, floor joints, and the underside of cabinets where moisture can linger. The longer the area stays wet, the higher the risk of mold and wood damage.

For large puddles or water that seeped under the machine, you may need to move the appliance to reach all wet spots. If the subfloor is soaked, drying can take days. In that case, consider calling local water damage pros who have industrial fans and dehumidifiers to dry the structure completely.

Know When to Call the Pros

Some leaks are simple to fix, but hidden leaks require professional help. If you cannot find the source, or if water has spread to walls, ceilings, or under the floor, the pros can use moisture meters to locate the problem. They can also extract water from carpets and padding that you cannot wring out by hand.

For a leak from a pipe inside the wall, you may need a plumber to repair the pipe itself. For water damage to drywall or insulation, the pros can remove and replace damaged materials. If you live in Redmond, keep your shutoff valve location written down for quick access during future emergencies.

  • Use moisture meters to find hidden leaks
  • Extract water from carpets and padding
  • Dry structural cavities with professional equipment
  • Replace water-damaged drywall and insulation
  • Help prevent mold growth after the leak

Prevent Future Leaks

Regular maintenance can prevent many laundry room leaks. Replace rubber supply hoses every five years or upgrade to braided stainless steel hoses, which are more durable. Check connections for drips every few months, and replace the washing machine's drain hose if it shows signs of wear.

Consider installing a leak detection system that alerts you to moisture near the machine. These devices are simple to set up and can save you from major repairs. Also keep the area around the washing machine clear so you can spot leaks early. If you notice a recurring issue, have a plumber inspect the pipes.

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Frequently asked questions

Can I fix a leaking washing machine hose myself?

Yes, if it is a simple hose replacement. Turn off the water, disconnect the old hose, and attach a new one with pliers. Make sure the rubber gasket is seated properly. If the leak is from a cracked fitting, you may need a plumber.

How do I know if the leak is from the machine or the pipes?

Run the washing machine through a cycle and watch the hoses and connections. If water appears only during the cycle, the machine is likely the source. If water is present even when the machine is off, the leak is probably from the supply pipes.

What should I do if water soaked into the subfloor?

Dry the area thoroughly with fans and a dehumidifier. If the subfloor is wood, it may warp or grow mold. In that case, call the pros to assess the extent and dry the structure properly. They can also help with any needed repairs.

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