Installing a Washing Machine Drain Hose: A Guide

The Hosemaster

March 07, 2025

Installing a Washing Machine Drain Hose: A Guide

Ever had a problem with a washing machine that just won’t drain properly? A poorly installed washing machine drain hose can lead to a host of issues like water siphoning, drainage issues, and even clothes that don’t get properly rinsed.

But fear not, because while it might seem tricky to install a washing machine drain hose, it is entirely manageable with the right guidance. And in this guide, that’s exactly what we’re going to do. Keep reading to learn more…

Understanding washing machine hoses

Before diving into the specifics of installing a washer drain hose, let's understand the various types of hoses your washing machine uses. Each hose serves a different purpose and has unique requirements for proper installation and maintenance.

The drain hose: typically grey in colour, the drain hose responsible for carrying wastewater out of the washing machine to the drain. It is essential for making sure that used water is properly expelled from the machine during and after each wash cycle. Proper placement and maintenance of the drain hose are critical to avoid drainage issues and water damage.
Hot and cold water supply hoses: these hoses bring clean water into the washing machine. Hot water supply hoses are usually red, while cold water hoses are blue or black. These hoses connect your machine to the water supply valves for a steady flow of water to each wash cycle. Burst supply hoses are one of the most common causes of water damage in homes, making their proper installation and maintenance vital.

Why washing machine hoses fail

Even with proper installation, washing machine hoses can fail over time due to various factors. Let’s look through the common reasons a washing machine hose might fail…

Wear and tear

All washing machine hoses experience normal wear and tear. High water pressure and hydraulic shock - known as water hammer - increase the water pressure in the hoses after each cycle, leading to deterioration. Regular inspections can help identify signs of wear before they become a serious concern.

Poor water quality

Hard water can corrode the inside of the washing machine hoses, which leads to sediment build-up. Over time, this can weaken the hoses and cause leaks or bursts. Using water softeners or filters can help mitigate this problem.

Improper washer hookup

A leak can form in a hose connector that isn't properly fitted and tightened. For example, if a hose is twisted or bent during installation, it has a higher risk of bursting or leaking into the home. Making sure you have a proper connection free from twists or bends can prevent these issues.

Worn rubber washer

A rubber washer sits at the end of the hose, sealing the supply valve and keeping water from leaking out. Over time, the rubber washer can wear down and loosen, allowing water to leak through. Regularly inspecting and replacing worn washers can help maintain a tight seal and keep your home leak-free.

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Understanding supply line hoses

Washing machine supply hoses are typically made of one of two materials, each with its own advantages and drawbacks. These are…

Synthetic rubber hoses

Synthetic rubber hoses, like those made from EPDM, are ideal for extreme temperatures, steam resistance, and are not affected by sunlight or UV, making them versatile and long-lasting.

But, while they are the most affordable option, they are also the least durable. Over time, synthetic rubber hoses can lose flexibility and strength, resulting in corrosion, cracks, and leaks. Synthetic rubber hoses offer a variety of types, but it’s crucial to check if they are reinforced, resistant to ozone, UV, weathering, and ageing.

Stainless steel hoses

Considered the industry standard for durability and flexibility, these hoses feature a PVC inner core protected by an outer braid of stainless steel armour that resists punctures, crimping, and kinking.

When choosing a braided stainless steel hose, look for markers of quality such as an inner core woven with polyester for added strength, a clear vinyl surround that cushions the tubing, and certifications like UPC, NSF 61, ASME, and CSA.

Despite their higher cost, they are a worthwhile investment due to their longevity and reliability. However, even the most robust hoses should be replaced periodically, as no hose lasts forever.

Understanding the drain system

The drain system of your washing machine relies on gravity to effectively remove water. There are three main types of drain systems you might encounter. The water drains out of the washing machine through a hose, which carries it to a standpipe, floor drain, or laundry tub. Let’s look at those in a little more detail:

Standpipe drain system: this is a vertical pipe that the drain hose empties into. It's commonly found in older homes or utility rooms. The standpipe needs to be at least 60 cm high to prevent backflow and water siphoning.
Floor drain system: often found in basements, this system requires a siphon break kit to prevent backflow. The siphon break is installed in the drain hose line and positioned higher than the water level in the washing machine.
Laundry tub drain system: the hose drains into a laundry tub or sink, which is a common setup in modern homes. The top of the laundry tub must be at least 60 cm, but not higher than 90 cm from the floor to ensure proper drainage.

How to install a washing machine hose

Whether you’re installing a new washing machine into a home, or need to replace the hose of your current model, the steps below will be sure to help make sure everything is set up correctly…

Preparing for installation

Before you start any installation, you should remove all packaging (to make it easier to work within the space) and clean the area to ensure it is free from dirt or debris. Make sure to also remove transit bolts and their casings, and cover the holes to prevent rattling or instability during operation.

The next thing you need to think about is safety. Make sure the washing machine is unplugged and the water supply is turned off to avoid any electrical hazards or water leaks. If you're moving the washing machine, get someone to help you to prevent injuries.

With all that out of the way, it’s nearly time to get started. You won't need a full toolbox, but a few key items will make the process smoother. Here's what you'll need:

Washing machine drain hose: make sure you have the correct hose for your machine. At The Hosemaster, we offer a variety of hoses, so you can choose one that fits your needs.
Drain hose clip or clamp: this will help secure the hose to the drain pipe. If you don’t have a suitable clamp, our range of clamps and clips will ensure a tight fit.
Screwdriver: depending on your washing machine model, you may need a flathead or Phillips screwdriver to access your drain hose and remove any attachments.
Pliers: these will be useful for loosening or tightening clamps attaching the drain hose to the washing machine.
PTFE tape or pipe sealant: to get watertight seals on threaded connections, PTFE tape or pipe sealant will be your best friend. Have some to hand when changing out those pipes.
Bucket and cloth: it may sound simple, but a handy bucket or container to catch any spills during the installation will save you from a water-related catastrophe. Keep a cloth on hand to wipe away any excess water.

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How to connect the drain hose

With all the preparation out of the way, let’s dive into how you replace a drain hose.

1. Access the drain hose

Pull the washing machine away from the wall to access the back of the machine. Depending on your machine’s setup, you might need to remove a back panel. Use a screwdriver to unscrew and remove the panel, if necessary.

a. Locate and remove the old drain hose

If you are removing an old or faulty drain hose, you will need to do this before installing the new hose. Locate the drain hose connection at the back of the washing machine. Use pliers to loosen the clamp or clip and carefully disconnect the old hose from the machine. Be prepared with a bucket or towel to catch any residual water that may spill out.

2. Install the new drain hose

Take your new drain hose and attach it to the correct connection point at the back of the machine. Make sure the hose is securely connected and tighten the clamp or hose clip using pliers. If your hose connection is threaded, you can wrap PTFE tape around the threads for an extra watertight seal before attaching the hose.

3. Position the drain hose

Proper placement of the drain hose is important for efficient drainage and to prevent any issues such as water siphoning back into the machine. The hose should be inserted a few centimetres into the waste pipe or standpipe, but not too far to avoid drainage problems. Make sure the hose is at the correct height - between 60 cm and 90 cm from the floor - and is not kinked or bent.

4. Secure the drain hose

Use a clamp or washing machine jubilee clip to secure the drain hose to the drain pipe or standpipe. This will stop the hose from coming loose or slipping out during operation. Make sure the hose is stable and well-positioned before moving on.

5. Test the new hose

Once the new hose is installed and secured, it’s time to test your handiwork. Turn the water supply back on and plug the washing machine into the socket. Run a test wash cycle to make sure the machine drains properly and to check for any leaks or issues.

6. Complete some final checks

After you’ve run a test cycle, check the connections to make sure there are no leaks. Double-check that the hose is securely fastened and that it is properly positioned. If everything looks good, push the washing machine back into place and replace any panels you removed.

Common mistakes to avoid

It will come as no surprise that there are a number of ways changing out a drain hose can go wrong. Save yourself the hassle by looking out for these issues as you replace your drain hose, and fixing them before they cause a problem.

Not turning off the water and power supply: one of the most crucial steps before starting any repair or replacement on your washing machine is to turn off both the water supply and the power supply. Failing to do so can lead to water leaks, electrical shocks, and potential damage to yourself, or the machine. Always double-check the washing machine is unplugged and the water valves are turned off before you begin.
Using the wrong type of hose: not all hoses are created equal. Using a hose that is not compatible with your washing machine can result in leaks, poor drainage, or damage to the machine. Always check your washing machine’s manual for the recommended type of hose and ensure you purchase one that matches those specifications.
Over-tightening connections: while it’s important to secure connections, over-tightening can strip the threads, crack the fittings, or cause the hose to become pinched. Tighten connections until they are snug, but avoid using excessive force.
Not properly securing the hose: over-tightening is bad, but so is under-tightening. A loosely connected drain hose can lead to leaks and improper drainage. Make sure the hose is firmly attached to both the washing machine and the drain pipe. Use clamps or hose clips to secure the hose in place and prevent it from slipping out during operation.
Inserting the hose too far into the drain pipe: inserting the drain hose too far into the drain pipe can cause water to siphon back into the washing machine, leading to drainage issues and potential damage to the machine. The hose should only be inserted a few centimetres into the drain pipe to maintain proper drainage without siphoning.
Kinking or bending the hose: a kinked or bent hose can restrict water flow, leading to poor drainage and potential blockages. Take care that the hose is positioned without any sharp bends or kinks. If space is tight, consider using a longer hose or repositioning the washing machine to avoid kinks.
Ignoring the height requirements: the height at which the drain hose is installed plays a big role in proper drainage. If the hose is installed too low, it can lead to siphoning issues. Too high, and the washing machine may struggle to pump out water effectively. Follow the manufacturer’s guidelines for the correct height, typically between 60 cm and 90 cm from the floor.
Failing to check for leaks: once the new hose is installed, check for leaks before putting the washing machine back into regular use. Run a test wash cycle and inspect all connections for any signs of water leakage. Address any leaks immediately to prevent water damage.

Special scenarios

Installing your washing machine drain pipe in a less conventional situation? You may benefit from the advice below, which delves into some of the special situations that require a little extra attention.

Plumbing under the sink

When connecting a washing machine under the sink, you need to locate the hose connections and turn off the water supply. Then you can follow the same steps as a standard installation. Make sure the drain hose is properly secured to prevent any leaks or drainage issues – and remember to keep the drain cap for any future changes in your setup.

Connecting to a standpipe

Ensure the standpipe's lip is about 75 cm from the ground. You might want to consider installing a non-return valve or hooking the drain hose up and under your worktop to prevent backflow. This will help maintain proper drainage and prevent water from siphoning back into the machine.

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Caravans

Portable washing machines in caravans are generally easier to connect. Attach the washer to the water source and follow the usual connection steps. Just make sure that the drain hose is properly secured and positioned to prevent any leaks or drainage issues. Given the limited space, make sure the hose is not kinked or twisted.

Plumbing in a washing machine and dishwasher together

When plumbing a washing machine and a dishwasher together, you need to check the hot and cold water supply requirements for both appliances. Use T-fittings and branch pipes to connect to a standpipe with a P-trap, checking everything is securely fastened. This will help maintain proper drainage for both appliances and prevent any potential issues.

Connecting to a waste pipe

If you're connecting to a foul water sewer rather than a rainwater soakaway, make sure to cut a hole in the wall for the waste pipe for proper drainage and to avoid any unwanted water backup. Be sure to use the appropriate fittings and sealants to create a watertight connection.

When connecting your washing machine drain hose to the waste pipe, you should choose the right type of connection to maintain a secure and leak-free installation. Here are three common types of waste pipe systems and how to connect to them:

Push fit waste: simply connect after removing any burrs from the pipe. Push fit connections are quick and easy, providing a secure and reliable connection.
Compression waste: cut and sand the pipe to get a smooth surface, then use a rubber washer and nut to secure the hose. This method is important because it offers a strong and reliable seal, which prevents water from escaping and causing potential damage.
Solvent weld waste: cut and sand the pipe, then use solvent cement to create a strong, permanent bond. Solvent weld connections are ideal for situations where a durable and long-lasting connection is needed.

Maintenance and troubleshooting

To be sure your washing machine operates efficiently and to avoid unexpected failures, it's essential to carry out regular maintenance inspections. Here are our top points to check:

Inspect the drain hose: periodically check the drain hose and connections for any signs of leaks, blockages, or kinks. A clean waste pipe makes sure the machine drains properly.
Inspect the supply hoses: similarly, check the hot and cold water supply hoses for wear and tear. Replace them if they show signs of deterioration.
Inspect the valves: if your washing machine uses a non-return valve, you may need to inspect it to ensure that it is working properly. If not, you can find a suitable replacement here at The Hosemaster.

Avoid excessive detergent use: using too much detergent can lead to build-up in the hoses and the washing machine, causing blockages and drainage issues. Follow the manufacturer's recommendations for detergent use.
Regular cleaning: regularly clean your washing machine, including the drum and detergent drawer, to prevent mould and residue build-up. Running a cleaning cycle with a washing machine cleaner can help keep your machine in good working order.
Keep the drain cap handy: retain the drain cap for future use. This cap can be a lifesaver if you need to disconnect and reconnect the drain hose, so put it some place you’ll remember for when the time comes to use it.

If you encounter any problems during the test cycle, here are some common issues and solutions:

Water siphonage: check the drain pipe setup is correct and avoid inserting the drain hose too far. If water is siphoning back into the machine, check the height and placement of the hose.
Drainage problems: check for blockages, kinks in the hose, and the correct drain hose height. Check the hose is properly secured and not obstructed.
Error codes: if you see error codes like LF or LD, it could indicate drainage issues. Press pause/cancel to clear the display and restart the cycle. If that doesn't work, unplug the washer or disconnect the power for a minute. Refer to your machine's manual for specific error code explanations and solutions.
Unusual noises: make sure the machine is level and adjust the feet if necessary. Check for any loose components or connections that might be causing the noise.
Unusual smells: clean the waste pipe and drain any stagnant water. Regularly run a cleaning cycle with a washing machine cleaner to prevent odours and build-up.

Don’t forget that your washing machine manual is a valuable resource for tips and troubleshooting specific to your washing machine model. If you can’t find one, online guides and videos can provide helpful visual demonstrations for common washing machine repair issues.

Satisfy your drain hose needs at The Hosemaster

At The Hosemaster, we offer a wide range of hoses, clamps, and clips to make fixing your washing machine secure and easy. Shop our hose range today to find everything you need to get the job done

If you have any questions, or require further information, please do not hesitate to contact us, or call 01282 604 002 to chat with our team for more personalised assistance.