A Guide to Safely Installing a Dishwasher

Important Information

• If you possess some manual skills and have experience using a screwdriver, replacing a dishwasher that is already installed is a relatively straightforward task.
• However, if you are installing a new dishwasher for the first time, there are specific guidelines that must be followed to ensure a safe and legal installation.
• Freestanding dishwashers typically have a height of 85cm, but you can easily remove the worktop to fit one into cabinetry that is only 80cm tall.

A dishwasher is a fantastic device that helps save time in the kitchen by eliminating the need to hand-wash dishes. Additionally, it is an environmentally-friendly option as it uses water and energy efficiently.

The good news is that installing a dishwasher is a relatively simple task, especially if you are replacing an old one that is no longer functional. However, as with any appliance installation, there are important factors to consider to ensure a smooth process, particularly when it comes to installing a new dishwasher where certain rules must be followed.

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Replacing an existing dishwasher

If you have taken accurate measurements and your new dishwasher fits perfectly in the designated space under your countertop, replacing an old dishwasher is quite easy. All the necessary infrastructure, including power, water, drainage, and space, is already in place. The process largely involves removing the old dishwasher, connecting the new one to the drain and inlet tap, plugging it in, and you're good to go with your new appliance.

What you will need:

• A screwdriver and/or a driver drill.
• A dropsheet or cardboard for optional protection.
• Tape for optional use.
• A mop and bucket to clean up any spills.
• The mounting hardware, inlet and outlet hoses that came with your dishwasher.

Step-by-step guide to replacing a dishwasher

Installing a dishwasher for the very first time

If your kitchen currently lacks the necessary fittings to accommodate a dishwasher, you will require the services of a certified electrician to install the power outlet, as well as a licensed plumber to handle the drain and water supply.

This requirement isn't solely for your peace of mind; it is a legal obligation that only authorized professionals are permitted to interact with the electrical wiring, sewer lines, or water pipes in your home. Attempting to take on these tasks yourself could result in substantial fines, and your insurance provider may reject any future claims arising from potential issues down the line.

Dishwashers pose a greater risk of catastrophic outcomes in the event of malfunctions or mishaps compared to most other household appliances, given their reliance on both electricity and water.

Essential Materials

• A screwdriver and/or a driver drill.
• A dropsheet or cardboard (optional).
• Tape (optional).
• A mop and bucket to handle any spills.
• The necessary mounting hardware, inlet and outlet hoses that were included with your dishwasher.
• A drill, hole saw, or any other appropriate tools for creating a 100 x 150mm opening in the side of your cabinetry.
• A prybar or similar tool for removing cabinetry.
• Sealant for safeguarding your benchtops against steam and water damage.
• A brush or roller for applying the sealant.
• A new tap connection (supplied by your plumber).
• A new drain connection equipped with an attachment for the dishwasher drain hose (supplied by your plumber).
• A new power outlet with the correct wiring (supplied by your electrician).

Getting Started

Begin by deciding where in your kitchen the dishwasher will be positioned, typically within the cabinet spaces on either side of your kitchen sink. This location ensures convenient access to both water and drainage systems.

Separating Power Outlets and Water Pipes

According to the Building Code of Australia, it is not permissible to install power outlets and water pipes in the same cabinet cavity as your dishwasher. Instead, your drainage, power, and water supplies must be situated in the adjacent cabinet, with hoses and cables passing through a small aperture (approximately 100 x 150mm) to connect with the appliance. Have you ever wondered why the plug for your dishwasher is located beneath the sink rather than behind the appliance? It serves the purpose of minimizing the risk of electrocution in the event of any leakage.

Additional Crucial Considerations for Dishwasher Installation

If you are retrofitting a dishwasher into an existing kitchen, you will need to eliminate the cabinet unit occupying the designated space. Although you may attempt this task independently, it would be prudent to hire a professional to avoid inadvertently damaging other components of your kitchen in the process.

Furthermore, it is imperative to give thought to your countertops. Steam and water spillage from the dishwasher can cause harm to laminated benchtops, so it is essential to ensure that the undersides of your counters are adequately sealed to mitigate the risk of water damage.

Finally, bear in mind that most dishwashers, particularly those designed to fit under countertops, are substantial appliances with unwieldy shapes and sharp edges. To ensure your safety, it is advisable to handle them with care and wear durable gloves to protect your hands. Ideally, enlist the assistance of a friend or family member when transporting the dishwasher into the kitchen.

Stock images: Getty, unless otherwise stated.