Elevating appliances above flood level means setting washers, dryers, water heaters and similar equipment high enough that expected floodwater can't reach their motors, controls and wiring. Appliance manuals say not to install machines where they'll be exposed to water, and FEMA's retrofitting guidance turns that into a height to plan around.
What the spec actually says
- •The manufacturer's location rule: Whirlpool's dryer installation guide says do not install or store the dryer where it will be exposed to water or weather. Washer guides carry the same kind of warning about weather exposure. Manuals don't set a flood height, because they can't know your house.
- •FEMA's guidance: FEMA's Homeowner's Guide to Retrofitting says that when the flood level is only 1 to 2 feet above the floor, furnaces, hot water heaters and appliances can be elevated on platforms constructed of concrete or masonry block. It recommends building at least 1 foot of freeboard (extra height) into your flood protection elevation. It also notes that if the flood level is at or near the ceiling, elevation in lower areas isn't possible, and that a licensed plumber or contractor will know the code requirements.
- •PSEG Long Island's safety rules: PSEG Long Island says don't step into a flooded basement or room if water has reached outlets, appliances or cords. It warns that wiring that's contacted salt water creates a risk of electrical faults or fires. After severe flooding, a licensed electrical contractor must inspect and repair the meter box and electrical system, and PSEG Long Island reconnects service once it receives a completed Licensed Electrician Inspection form.
Put together, the spec is: know your expected flood level, add at least a foot, and place the appliance's base, controls and connections above that height.
Why manufacturers require it
- •Electrical parts: Motors, control boards and wiring harnesses aren't sealed against submersion. Once wet, especially with salt water, they can corrode or short.
- •Gas parts: Gas valves, burners and pilot assemblies that have been underwater need inspection before use.
- •Contamination: Floodwater carries sewage, sediment and salt into pumps, seals and insulation.
- •Shock risk: Energized water around plugged-in appliances is the danger PSEG warns about.
How to check your home against it
- Find the highest water level your basement has reached, from marks on walls, past records or neighbors.
- Ask your town or village floodplain administrator about the expected flood level for your property.
- Add at least 1 foot of freeboard, as FEMA suggests, to set your target height.
- Measure the height of each appliance's base, its control panel and the outlets it plugs into.
- Note where gas, water and vent connections would need to move if the appliance were raised.
- Check whether the basement ceiling leaves room. Raised machines still need their own clearances, and stacked laundry has height limits.
What happens when it's ignored
- •Washers, dryers and water heaters at floor level are ruined by even shallow floodwater.
- •Salt water from coastal flooding accelerates corrosion in wiring and controls.
- •Outlets below the water line create shock hazards and delay restoring power.
- •Raising a machine without moving its outlet or vent can leave connections strained or out of spec.
Raised laundry has to meet floor and temperature specs too. See washer and dryer temperature limits in unheated garages if the laundry moves to a garage.
When it needs a licensed pro
- •Moving outlets, circuits or the electrical panel above flood level is work for a licensed electrician. After severe flooding, PSEG Long Island requires a licensed electrical contractor's inspection and a submitted inspection form before it reconnects service.
- •Moving water lines, drains or adding a backflow valve is plumbing work, which FEMA notes is usually regulated by state and local codes.
- •Relocating a gas dryer or water heater requires a licensed gas fitter or plumber.
- •FEMA says a design professional must determine the expected wind and earthquake forces on elevated equipment at the site.
Sources
- •Whirlpool: 29-inch electric dryer installation instructions W10617663C (don't install where exposed to water or weather)
- •FEMA: Homeowner's Guide to Retrofitting, Chapter 8 (platforms for 1 to 2 feet of flooding; 1 foot of freeboard; design professional; licensed contractors)
- •PSEG Long Island: Flood Safety (flooded basements; salt water; licensed electrical contractor inspection and form before reconnection)
Quick check: Measure your basement's last high-water mark and add a foot. Anything below that line is at risk.
If basement appliances took on water, have them checked before use. Call TrueFix Long Island at (631) 985-3690, including in South Shore areas such as Freeport and Baldwin.