How to Hook Up a Washing Machine Safely

Installing a washing machine might seem straightforward, but getting it wrong can lead to leaks, flooding, electrical issues or damage to the appliance. Whether you're replacing an old machine or setting up a new one, it’s important to follow the correct steps to keep your home safe.

At JUSTHIRE, we make it easy to book professional washing machine installation online. Enter your postcode, upload a photo and get a fixed price instantly with no site visit needed.

Here’s a simple, safe guide to hooking up a washing machine properly.

Before You Start: What You Need to Check

Before installation, make sure:

The water supply valves are working
The electrical socket is safe and accessible
The drainage pipe is clear
The floor is level and strong enough
You have enough space behind and around the appliance

If your old machine leaked, moved around or tripped the electrics, it may indicate a deeper issue that needs professional attention.

Step 1: Position the Washing Machine

Carefully move the machine into roughly the right place, but leave enough room behind it to attach the hoses. Avoid tipping it too far backwards, and never drag the machine on delicate flooring.

Step 2: Connect the Water Supply Hoses

Most washing machines use two hoses:

Cold water inlet (usually blue)
Hot water inlet if required (usually red)

Many modern machines only need a cold feed.

How to connect them:

Locate the water inlet valves on the wall.
Attach each hose to the correct valve and tighten by hand.
Connect the opposite end to the washing machine inlet ports.
Make sure the rubber washers are in place to prevent leaks.

Avoid overtightening, as this can damage the threads.

Step 3: Connect the Drain Hose

The drain hose can connect in one of two ways:

1. Standpipe connection

The hose hooks over an open standpipe.

2. Sink waste connection

The hose attaches to a dedicated waste outlet under the sink.

Ensure:

The hose is secure
It isn’t kinked
It’s high enough to prevent backflow

Poor drainage setup can lead to foul smells or water backing up into the machine.

Step 4: Level the Washing Machine

A machine that isn’t level can:

Shake aggressively
Cause excessive noise
Wear out faster
Move across the floor during spin cycles

Adjust the machine's feet until it sits firmly and evenly on the floor.

Step 5: Turn on the Water and Check for Leaks

Slowly turn the valves back on and check:

Hose connections
Under the sink
Around the back of the machine

Even a slow drip can become a big problem if left unnoticed.

Step 6: Plug In and Run a Test Cycle

Run a short wash or rinse cycle to ensure:

Water enters the machine correctly
The drum spins smoothly
The machine drains properly
No water leaks during operation

If anything seems unusual, stop the machine and inspect the connections.

Common Safety Mistakes to Avoid

Using damaged hoses
Over tightening connections
Leaving the machine unlevel
Ignoring small leaks
Using an extension lead for power
Connecting hoses to the wrong valves
Not securing the drain hose properly

These can all lead to long term damage or immediate safety risks.

When You Should Hire a Professional

You should get expert help if:

Your water valves are stiff or leaking
You’re installing the machine in a new location
The drainage setup is complex
You’re unsure about electrical safety
The appliance is too heavy to move safely
You want a fast, guaranteed installation

A professional installer ensures everything is fitted safely and correctly.

Why Choose JUSTHIRE for Washing Machine Installation

JUSTHIRE connects you with trained, insured local professionals who can install your washing machine safely and efficiently.

With JUSTHIRE you get:

Instant online fixed price quotes
Safe, professional installation
No site visit needed
Fast, reliable service
Clean and tidy work

Book Your Washing Machine Installation Today

Whether you’re replacing an old machine or setting up a new one, JUSTHIRE makes it simple to book a trusted professional.

👉 Enter your postcode and get your free online washing machine installation quote today.