Laundry room smart kit
Updated
Leak sensors, cycle-done alerts and a humidity sensor for the laundry room, plus the dryer vent and hose upgrades that cut the usual fire and flood risks. Includes prices.
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Before you buy
The laundry room combines three things that go wrong: water, heat and moisture. The EPA estimates that the average household’s leaks can waste more than 9,300 gallons of water a year, and the Insurance Information Institute reports about 1.5 water damage and freezing claims per 100 insured homes a year in 2019–2023, with an average claim of roughly $15,400. On the fire side, the U.S. Fire Administration reports that failure to clean was the leading factor contributing to ignition in home clothes dryer fires in 2018–2020, at 31%.
What each device is for
- Leak sensors catch washing machine hose failures, drain overflows and water heater leaks. They alert you; they do not turn the water off. For that, add the valve in our water leak protection kit.
- Vibration sensors tell you when a load is done. This is more reliable for a 240 V dryer than a plug-in meter, which cannot measure it.
- The humidity sensor logs the room, so you see whether a damp basement or a poorly vented dryer pushes it above 60%.
Why not a smart plug on the washer or dryer?
The U.S. Fire Administration advises plugging major appliances, including washers and dryers, directly into a wall outlet and never using an extension cord with them. Dryers run on 240 V and a standard smart plug cannot handle that. So this kit watches the machines with stick-on sensors instead of changing how they are plugged in.
Dryer upkeep that matters most
- ENERGY STAR advises cleaning the lint filter after every load, which also improves air circulation.
- Dryer sheets can leave a film on the filter that reduces airflow. ENERGY STAR suggests scrubbing the filter with a toothbrush once a month.
- Clean the duct between the dryer and the wall once a year or more often with heavy use, and vent the dryer outdoors.
- If the dryer is gas, do not disconnect gas lines yourself. Hire a qualified technician for anything that touches the gas connection, and unplug the dryer before you work on the duct.
Where to place the sensors
| Spot | Device | Reason |
|---|---|---|
| Floor behind the washer | Leak sensor | Hose bursts and drain overflow |
| Base of the water heater | Leak sensor | Tank leaks |
| Floor drain or sump pit | Leak sensor | Backup or pump failure |
| Side panel of the washer and dryer | Vibration sensor | Cycle done alert |
| Wall at shoulder height, away from the dryer vent | Temperature and humidity sensor | Room humidity and freeze alerts |
Core items
Water leak sensors × 3
$15–$35One behind the washing machine, one by the water heater or utility sink and one near the floor drain or sump pit. They sound a siren locally and send a phone alert at the first drip.
What to look for: a loud built-in siren, battery life of a year or more, the same protocol as your hub or app, a low-battery alert, flat shape for tight gaps
See options on AmazonVibration or motion “cycle done” sensors × 2
$15–$40Stuck to the side of the washer and dryer, they sense when the shaking stops and trigger a notification, a light or a smart speaker announcement. They work with 240 V dryers, where a plug-in meter does not.
What to look for: adjustable sensitivity, small adhesive mount, works with your hub or app, battery life of a year or more
See options on AmazonTemperature and humidity sensor
$10–$30Shows whether the laundry room or basement stays above the 60% humidity level the EPA flags, and warns you before a cold utility room reaches freezing.
What to look for: humidity and temperature in one unit, app history, alerts at thresholds you set, long battery life
See options on AmazonNice to have
Dryer vent cleaning brush kit
$15–$30A flexible rod and round brush for the vent duct between the dryer and the wall. Failure to clean is the top contributing factor in home dryer fires.
What to look for: rod long enough for your run (often 10 ft or more), brush sized to a 4-inch duct, usable with a cordless drill
See options on AmazonBraided stainless washing machine hoses × 2
$12–$25Old rubber hoses can burst and flood a floor. Braided hoses are a low-cost upgrade, done when the machine is already pulled out.
What to look for: braided stainless steel, right length, new washers included, a 5-year or longer rating on the box
See options on AmazonWashing machine drain pan
$20–$50A shallow plastic tray under the washer with a drain port that catches small leaks and gives your sensor a place to sit.
What to look for: size that fits your washer, a drain fitting, a lip tall enough to hold a small spill
See options on AmazonDehumidifier with continuous drain
$200–$450For a damp laundry room or basement. A hose lets it run without a bucket to empty.
What to look for: humidistat, continuous drain hose or pump, ENERGY STAR, size to match the pint chart
See options on AmazonStep by step
- Pull the washer forward, check the hoses and replace old rubber ones with braided stainless hoses; hand-tighten, then add a quarter turn with pliers.
- Place leak sensors flat on the floor at the washer, water heater and drain, and pair each one under a clear name.
- Stick a vibration sensor on the side of the washer and the dryer. Run a short cycle and adjust sensitivity until it sends “started” and “done” alerts.
- Mount the humidity sensor and set alerts at 60% humidity and 40°F.
- Unplug the dryer, clean the lint trap slot and run the brush through the vent duct from the dryer side, then from outside if you can reach it.
- Check the outdoor vent cover opens when the dryer runs and is free of lint and debris.
- Test each leak sensor with a damp paper towel, then set a reminder to test twice a year.
Cheaper or upgraded versions
Budget version, about $45–$100: two leak sensors and one vibration sensor. Add the braided hoses and vent brush the next time you are shopping.
Upgrade, around $350–$800 or more: add a smart shutoff valve on the washer supply or main line (professional install is common) and a continuous-drain dehumidifier. The washer valve stops the water when a sensor trips; see the smart water shutoff valve guide.
Frequently asked questions
How do I get a notification when the laundry is done?
A vibration sensor on the machine detects when the shaking stops and sends an alert. Our guide to washer and dryer done notifications compares four setups.
Can I use a smart plug on my washer or dryer?
The U.S. Fire Administration advises plugging washers and dryers directly into a wall outlet, and dryers use 240 V, which standard plugs cannot handle. Use stick-on sensors instead.
How often should I clean my dryer vent?
Clean the lint filter after every load and the duct at least once a year, more often with heavy use. Failure to clean is the leading factor in home dryer fires, according to the U.S. Fire Administration.
Do I need a hub for these sensors?
Not with Wi-Fi sensors, which work through their app. A hub helps if you want several sensors to run locally and trigger a shutoff valve.