What You Need Before Installation Day
Most appliance installation starts with three things: the right space, the right connections, and the right tools. Before you buy or schedule delivery, measure the space where the appliance will go—width, depth, and height—and compare those numbers to the appliance's dimensions. Many refrigerators, dishwashers, and ranges are wider or deeper than people expect, and a delivery truck at your door is the wrong time to discover it won't fit through the kitchen doorway.
Next, check what connections the appliance needs. A gas range requires a gas line and an electrical outlet. An electric range needs only a dedicated 240-volt circuit. A dishwasher needs hot water, a drain line, and electricity. A washer and dryer need water lines (washer only), a drain, and electrical outlets—gas dryers also need a gas line. If your home doesn't have the right connection, you'll need to hire a plumber or electrician before the appliance arrives, which can add weeks to your timeline.
Finally, gather basic tools: a level, adjustable wrench, screwdrivers (Phillips and flathead), and a flashlight. Some installations also need a socket wrench set or a pipe wrench if you're connecting water lines yourself. Read the manufacturer's manual before delivery day—it tells you exactly what you'll need and what the installer will do versus what you'll do.
Key Takeaways
- Measure your space and doorways before purchase, because appliances often don't fit where you think they will.
- Verify that your home has the correct connections—gas line, electrical circuit, water line, or drain—before scheduling delivery.
- Professional installation is often included with purchase or costs $100 to $300 per appliance, and covers liability if something goes wrong.
- If you install yourself, follow the manual exactly, test all connections before closing up walls or cabinets, and know when to call a licensed plumber or electrician instead.
- Most appliances need 24 to 48 hours to settle after delivery before you use them, especially refrigerators that were transported on their side.
Deciding Between Professional Installation and DIY
Professional installation typically costs $100 to $300 per appliance, depending on the type and your location. Many retailers include it free with purchase, or offer it for a flat fee. The advantage is clear: the installer carries liability if something breaks, the water line floods your kitchen, or the gas connection leaks. They also know local building codes and what your home's electrical panel can handle. If something goes wrong, you have a receipt and a company to call.
DIY installation works if you have plumbing or electrical experience, the manual is clear, and the connections are straightforward. A refrigerator or microwave is low-risk—they plug in and sit. A dishwasher or washer is medium-risk if you're comfortable with water lines and basic plumbing. A gas range or dryer is high-risk and usually requires a licensed plumber or electrician in most jurisdictions, even if you do the rest yourself. Check your local building codes before you start; some areas require permits and inspections for gas or electrical work.
A middle path exists: hire a professional for the plumbing or electrical work, then handle the rest yourself. This costs less than full installation but keeps you from making a mistake that voids the warranty or creates a safety hazard.
Installing a Dishwasher
A dishwasher needs three connections: hot water in, drain out, and electricity. The hot water line usually connects under the sink with a shutoff valve and a compression fitting. The drain line runs to the sink's drain or garbage disposal. The electrical outlet should be within reach of the dishwasher's cord, ideally a dedicated 15-amp circuit (not shared with other appliances).
Before you start, turn off the water and electricity at the source. Slide the dishwasher into its opening—it should fit snugly but not so tight that you have to force it. Screw the mounting brackets to the underside of the countertop so the dishwasher doesn't shift when you open the door. Connect the hot water line to the inlet valve on the back of the unit using the compression fitting and wrench; hand-tighten first, then use the wrench for a quarter-turn more. Connect the drain hose to the sink's drain or garbage disposal outlet, securing it with a hose clamp. Plug in the power cord, turn the water back on, and run a test cycle with no dishes inside to check for leaks before you load it.
The most common mistake is connecting the drain line too low, which allows water to siphon backward into the dishwasher. The drain hose should loop up under the sink before it drops to the drain, creating a high point that prevents backflow. If you see water pooling under the sink after the first cycle, the drain connection is the first thing to check.
Installing a Washer and Dryer
A washer needs hot and cold water lines, a drain, and electricity. A dryer needs a vent to the outside, electricity (or a gas line for gas models), and ideally a drain for the condensation (though some models evaporate it). Both should sit on a level floor; if they're not level, they'll vibrate and walk across the room during the spin cycle.
Start by connecting the water lines to the washer's inlet valves—hot to hot, cold to cold—using the compression fittings that come with the machine. Tighten by hand first, then a quarter-turn with a wrench. Connect the drain hose to a standpipe (a vertical pipe that drains into your home's waste line) or to a laundry sink. The drain hose should not be kinked or submerged; it should sit loosely in the standpipe so air can escape as water drains. For the dryer, connect the vent hose to the dryer's outlet and run it to an exterior vent opening—never vent into the attic or crawlspace, as lint and moisture will accumulate there. find the vent hose with hose clamps and make sure it slopes slightly downward toward the outside to prevent lint from settling inside the hose.
Plug both machines in, run a test cycle on the washer with no clothes, and check for leaks at the water connections. If you see drips, tighten the fitting a quarter-turn more. For the dryer, run it for five minutes and feel the exterior vent to confirm warm air is flowing out. If the vent is cold or barely warm, the hose is kinked or clogged with lint.
Installing a Range or Cooktop
An electric range needs a dedicated 240-volt circuit; a gas range needs both a gas line and an electrical outlet for the igniter and controls. Both types need ventilation—either a range hood that vents outside or a recirculating hood with a charcoal filter (less effective but acceptable in some kitchens).
For an electric range, the circuit and outlet must be installed by a licensed electrician in most areas. Once the outlet is in place, slide the range into its opening, level it front-to-back and side-to-side using the adjustable feet underneath, and plug it in. find it to the countertop or wall with the mounting brackets provided in the manual.
For a gas range, a licensed plumber or gas fitter should connect the gas line using a flexible connector and a shutoff valve. Once the gas connection is tested and approved, slide the range into place, level it, and plug in the electrical cord. Never attempt to connect a gas line yourself unless you are licensed to do so; a leak is a serious safety hazard.
After installation, test all burners and the oven to confirm they heat evenly. If one burner is significantly hotter or cooler than the others, the burner cap may be misaligned or the burner itself may be defective—check the manual for adjustment steps or contact the manufacturer.
Installing a Refrigerator
A refrigerator is one of the simplest appliances to install: it needs only an electrical outlet and, if it has an ice maker or water dispenser, a water line. The outlet should be within a few feet of the back of the unit so the cord doesn't stretch across the kitchen.
If your refrigerator has an ice maker, connect the water line to the inlet valve on the back using a compression fitting and wrench. Some models come with a saddle valve that clamps onto an existing water line under the sink; others need a dedicated line run from the main water supply. Check your manual to see which type yours is. Turn on the water and run the ice maker for a few cycles to flush out any debris before you use the ice.
Slide the refrigerator into place and level it front-to-back using the adjustable feet—the front should be slightly higher than the back so condensation drains toward the back. Plug it in and let it sit for 4 to 24 hours before you load it with food. If the refrigerator was transported on its side (which some delivery services do to fit it in a truck), wait at least 4 hours before plugging it in; the compressor oil needs time to settle back into the compressor, or the unit may be damaged.
What to Do If Something Goes Wrong During Installation
If water leaks from a connection, turn off the water when ready at the shutoff valve. Dry the area completely and inspect the fitting—if it's hand-tight, tighten it a quarter-turn with a wrench. If it's already tight and still leaking, the compression fitting may be defective or the ferrule (the small metal ring inside the fitting) may be damaged. Disconnect the line, inspect the ferrule, and reconnect it. If the leak persists, the line itself may be cracked; replace it with a new one.
If an electrical outlet doesn't work, check that the circuit breaker hasn't tripped. If it has, flip it back on. If it trips again when ready when you plug in the appliance, the appliance may be defective or the outlet may be wired incorrectly—stop using it and contact the retailer or manufacturer. Do not attempt to rewire an outlet yourself unless you are a licensed electrician.
If a gas appliance smells like gas, turn it off when ready, open windows, and call your gas company's emergency line. Do not use the appliance again until a licensed technician has inspected it. A gas smell usually means a connection is loose or a valve is leaking, both of which are serious safety hazards.
If an appliance doesn't work after installation, consult the manual's troubleshooting section before you call for service. Many problems—a dishwasher that won't drain, a washer that won't fill, a dryer that won't heat—have straightforward fixes like a clogged filter or a misaligned hose. If the manual doesn't solve it, contact the manufacturer's customer service line or the retailer where you bought it.
Frequently Asked Questions
Do I need a permit to install an appliance myself?
It depends on the appliance and your location. Gas ranges, gas dryers, and major electrical work usually require a permit and inspection in most jurisdictions. Dishwashers, washers, and refrigerators typically do not. Check with your local building department before you start; if you install without a required permit and something goes wrong, your homeowner's insurance may not cover the damage.
How long should I wait before using a new appliance after delivery?
Most appliances can be used when ready after installation, except refrigerators. If a refrigerator was transported upright, you can plug it in right away. If it was transported on its side, wait 4 to 24 hours before plugging it in so the compressor oil can settle. Check your manual for the specific wait time for your model.
What if my home doesn't have the right electrical circuit for my new appliance?
You'll need to hire a licensed electrician to install a new circuit. This typically costs $300 to $800 depending on the distance from your electrical panel and local labor rates. Plan for this work before you schedule appliance delivery, as it can take a week or more to complete.
Can I connect a gas dryer to the same gas line as my range?
In most cases, yes, but only if the line is sized correctly and a licensed plumber or gas fitter installs it. A single gas line can serve multiple appliances if it has enough capacity. Never attempt to split a gas line yourself; improper connections can cause leaks or safety hazards.
What should I do with the packaging and styrofoam after delivery?
Keep the packaging for at least 30 days in case you need to return the appliance. After that, check if your local recycling center accepts styrofoam and cardboard. Some retailers will take packaging back if you ask; call before you discard it.