How to Install a Dishwasher : An Appliances Online Guide

The first step is deciding if you’ll install the dishwasher yourself or hire a professional. For a simple swap-where you're replacing an old freestanding dishwasher with a new one using the same connections-a DIY installation is definitely possible. However, if you're installing a dishwasher for the first time, or have chosen a built-in or integrated model, you will need a licensed plumber and/or electrician to do the job safely and correctly. For total peace of mind, you can add professional installation to your order at the Appliances Online checkout.

When to DIY	When to Call a Pro
You are replacing an existing freestanding dishwasher.	This is a brand-new installation (no previous dishwasher).
All power, water, and drainage connections are already in place and are the correct type.	You need new plumbing or electrical outlets installed.
You are comfortable with basic tool use and following instructions.	You've chosen a built-in or fully integrated model.
Your new dishwasher is a similar size and type to your old one.	You need to alter your cabinetry to make the dishwasher fit.

A few quick checks before your new dishwasher arrives will ensure a smooth installation day. Taking five minutes now can save you a lot of hassle later.

Screwdriver or Drill
Tape Measure: To double-check your cavity dimensions (height, width, and depth) and ensure a perfect fit.
Pliers, only where permitted by the manufacturer: To securely tighten the water inlet hose connections after hand-tightening them.
Adjustable spanner or the adjustment tool supplied with the dishwasher: Needed to adjust the leveling feet at the base of the dishwasher so it doesn't rock or wobble.
Towels: To quickly wipe up any unexpected drips or spills during the swap.
Bucket or large plastic bowl: To catch any leftover water when unscrewing the old hoses from the water supply.
Spirit level
Torch for checking connections under the sink

Get your tape measure out and check the height, width, and depth of the cavity where your dishwasher will go. Most dishwashers, like the Bosch 60cm Series 4 Freestanding Dishwasher (SMS4HVI01A), are a standard size (around 600mm wide, 600mm deep, and 845mm high). A great feature to look for is a removable lid, which many freestanding models have. This allows you to take off the top panel, reducing the height to about 815mm so it can slide neatly under your kitchen benchtop.

You’ll need three key connections within reach of your dishwasher spot (usually about 1.5 metres):

Power: A standard electrical socket is all you need. Check that the cord on your new dishwasher will reach it easily.
Water Inlet: Look under your sink for a small tap with a screw-on thread-this is where the water comes from. Most modern dishwashers, including models from LG and Bosch, only need a cold water connection because they heat the water themselves with great efficiency.
Drainage: Your dishwasher needs to pump used water away, usually into the S-bend plumbing under your sink. Check for a dedicated connection point (a spigot) on the pipe. If it's a new installation, this spigot may be sealed and need to be cut open.

The dishwasher type you choose affects how it fits into your kitchen, how complex the installation will be and whether professional help is recommended.

Freestanding dishwashers are generally the simplest type to install because they have finished sides and a top panel. They can sit at the end of a cabinet run or slide beneath a benchtop when their dimensions allow. Many models have a removable top panel, but this should only be removed when permitted by the manufacturer. Check the manual for the required cavity size, clearances and hose-routing instructions before installation.

A straightforward replacement may be suitable for DIY installation when the existing water, drainage and power connections are already in place.

Under-bench dishwashers are designed to fit permanently beneath a kitchen benchtop. Unlike freestanding models, they usually do not have a finished top panel and are intended to sit neatly within the cabinetry. Installation requires accurate cavity measurements, correct levelling and, depending on the model, securing the dishwasher to the surrounding cabinetry or benchtop. Follow the manufacturer’s installation instructions carefully and consider professional installation if adjustments are required.

Fully integrated dishwashers are completely concealed behind a custom cabinet door, including the controls. These models require precise cabinetry measurements, correct door-panel fitting and careful adjustment of the door mechanism. Professional installation is strongly recommended to help ensure the dishwasher is secure, level and able to open and close correctly.

Semi-integrated dishwashers sit within the cabinetry and use a matching cabinet panel below a visible control panel. Because the cabinet panel must be correctly measured, fitted and balanced, installation is more involved than installing a freestanding model. Professional installation is generally recommended, particularly when cabinetry needs to be altered.

Ready to replace your old dishwasher? This guide covers the basic steps for a standard swap. Always read and follow the installation instructions supplied with your dishwasher before beginning. Installation requirements can differ significantly between models, so the manufacturer’s instructions take priority over the general steps below.

Before unpacking everything, confirm that the dishwasher is suitable for the available space and existing connections.

The cavity’s height, width and depth
Required ventilation and clearance around the appliance
Whether the dishwasher’s top panel can be removed
The location and reach of the inlet hose, drain hose and power cord
The type of water connection required
The permitted drain-hose height and connection method

Do not use extension cords, multi-plug adaptors or hose extensions unless the manufacturer specifically permits them.

Turn off the dishwasher’s water supply tap beneath the sink. Switch the old dishwasher off at the wall and unplug it before disconnecting anything.

Place a bucket and towel beneath the hose connections, as water may remain inside the inlet and drain hoses.

If the existing appliance is hardwired rather than connected through a standard accessible power point, stop and arrange for a licensed electrician.

Disconnect the water inlet hose and drain hose according to the old appliance’s instructions. Keep the hoses positioned over the bucket to catch any remaining water.

Carefully pull the old dishwasher forward while checking that its hoses and power cord are not snagged. Once removed, inspect the cavity and existing connections for leaks, corrosion, damage or blockages.

Do not connect the new appliance to a damaged tap, power point, hose fitting or drainage connection.

Remove the packaging and check the appliance for visible damage. Locate the inlet hose, drain hose, fittings, clamps, levelling instructions and installation manual.

Remove any transit packaging or protective components identified in the manual, but do not remove parts that appear to be permanently attached.

Some dishwashers have an AquaStop or anti-flood device built into the inlet hose. Do not cut, alter, immerse or incorrectly position this component; follow the model’s instructions carefully.

Before pushing the dishwasher into its final position, plan how the inlet hose, drain hose and power cord will reach their connection points.

Feed them through the appropriate cabinetry opening without twisting, crushing or sharply bending them. The drain hose must not be kinked, squashed or obstructed, as this can prevent the dishwasher from draining correctly.

Keep the power cord away from water connections and ensure it will remain accessible where required by the manual.

Connect the inlet hose to the dishwasher if it is not already factory-fitted, following the manufacturer’s instructions.

Attach the other end to the designated water supply tap. Make sure any supplied washer or seal is correctly seated. Start the connection by hand to avoid cross-threading, then tighten it only as directed in the manual.

Avoid applying a universal “extra quarter-turn” rule. Overtightening can damage the fitting or seal, while insufficient tightening may allow a leak.

Slowly turn on the water supply and inspect the connection for drips before moving the appliance fully into position.

Attach the drain hose to the designated dishwasher connection on the sink trap or drainage plumbing, using the supplied clamp or fitting.

Check that the connection point is open and suitable for use. A previously unused dishwasher spigot may still be sealed; opening or modifying plumbing should be handled by a licensed plumber where required.

Route and secure the drain hose at the exact height and in the configuration shown in the dishwasher’s manual. Some installations require a raised loop to help prevent wastewater from flowing back towards the dishwasher, but the required height and arrangement vary between models. The hose must not be kinked, compressed or pushed too far into a drain connection.

With the hoses and cord connected or correctly routed, gently slide the dishwasher towards the cavity.

Move it a little at a time while checking beneath the sink and behind the appliance. Make sure the hoses and power cord do not become trapped, stretched, twisted or crushed.

Leave enough access to inspect the connections before pushing the dishwasher completely into place.

Place a spirit level across the top of the dishwasher and check it from side to side and front to back.

Adjust the feet using the method and tool specified in the manual. The appliance should sit firmly without rocking, and the door should open, close and latch smoothly.

Correct levelling is important for proper operation and may also help prevent leaks or door-alignment problems. Electrolux specifically recommends checking levelling and adjusting the appliance’s feet when investigating dishwasher leaks.

Freestanding dishwashers should not automatically be screwed to cabinetry unless the manufacturer’s installation instructions require an approved fixing method.

Once the dishwasher is correctly positioned and level, plug it directly into the appropriate power point and switch it on.

Follow the manual’s first-use instructions. These may include adding dishwasher salt, setting the water-hardness level, adding rinse aid or running an initial empty cycle.

Run the recommended test, rinse or short program. During the cycle:

Check the water inlet connection for leaks
Check the drain connection while the dishwasher is pumping out
Look beneath and around the appliance for water
Listen for unusual vibration or movement
Confirm that the appliance fills, washes and drains normally

Inspect the connections again after the cycle finishes. If you notice leaking, poor drainage, an error code, unusual noises or movement, switch off the dishwasher, turn off its water supply and consult the troubleshooting section of the manual or arrange professional assistance.

For anything more than a simple swap-out, professional installation is your best bet. It guarantees your dishwasher is installed safely, meets all local plumbing and electrical regulations, and protects your home (and your appliance's warranty). When you buy from Appliances Online, you can book a professional, licensed installer right at the checkout. Our team will connect your new dishwasher to existing water and power points, ensure it's perfectly level, run a test cycle, and even give you a quick rundown on how to use it. It’s the ultimate hassle-free experience.

We’re here to make getting your new dishwasher as simple as possible. It starts with our huge range and 24/7 Aussie-based support to help you choose the right model. Once you've ordered, you get our Legendary Service. This includes Free Next-Day Delivery to most metro areas, so you won’t be waiting long. On delivery day, you'll receive a live tracking link to follow your driver's journey in real time-no more waiting around all day. While dishwasher connection requires a paid professional service, our team can take your old, disconnected appliance away for Free Removal and recycling. It’s a complete service designed to save you time, money, and a whole lot of heavy lifting.

Frequently Asked Questions

Yes, you can install a dishwasher yourself if you are simply replacing an existing freestanding model with all the right connections already in place. For new installations, integrated models, or if any plumbing or electrical work is needed, you must use a licensed professional.

You will need a licensed plumber if you are installing a dishwasher for the first time or if the existing pipes need to be changed. For a straightforward replacement, a plumber usually isn't necessary.

Yes, most standard 60cm freestanding dishwashers are designed to fit under a standard kitchen counter. Many models from brands like Bosch, Beko, and Haier feature a removable worktop (lid), which reduces the overall height from around 845mm to 815mm for a perfect fit.

Most modern dishwashers are designed for a cold water connection only, as their internal heaters are more energy-efficient at heating water to the precise temperature needed for each cycle. Some models, like the Westinghouse WSF6608KXC, can be connected to hot water, but always check the product specifications first.

A standard dishwasher requires a space that is roughly 605mm wide, 850mm high, and 600mm deep. Always measure your cavity and compare it to the specific dimensions of the model you're buying, leaving a little extra room at the back for hoses and cords.

How to Install a Dishwasher : An Appliances Online Guide

When to DIY and When you need a Pro

Before You Start: The Pre-Installation Checklist

Choose the Right Dishwasher Type for Your Installation

A Step-by-Step Guide to Installing a Freestanding Dishwasher

Why calling in a Pro is the Best Option

Frequently Asked Questions