When in search of a new drain hose for your washing machine, it's essential to begin by identifying the appropriate size.

Whether you're in the process of replacing an existing drain hose or looking to extend its length, it's crucial to select the right drain hose tailored to your washing machine to guarantee the proper functioning of the system.

While there may be variations in washing machine drain hoses, the prevalent size in the United Kingdom for both washing machines and dishwashers typically features a 21 mm diameter. These hoses come in various lengths, but the most frequently encountered replacement drain hose measures 2.5 meters.

Washing Machine Drain Sizes

In summary, the Universal Plumbing Code has established new standards for washing machine drain sizes, requiring a 2-inch diameter pipe.

The height of the standpipe should fall between 18 and 30 inches from the floor, and the P-trap should be positioned within the range of 6 to 18 inches from the floor. These standpipes play a crucial role in connecting the washing machine to the home sewage system.

Additionally, they must adhere to venting regulations as outlined in the Universal Plumbing Code or local codes specific to your area. Complying with these standards ensures proper drainage and ventilation for your washing machine, contributing to the efficient and safe operation of your home's plumbing system.

Can You Replace a Washing Machine Drain Hose?

  1. You have the option to replace the drain hose on your washing machine.
  2. If you observe water leaking from the rear of your washing machine, it's highly probable that the source of the leak is the drain hose. There is likely a tear or split in the hose.
  3. Such damage can happen gradually or as a result of mishandling the machine during transport.
  4. A damaged drain hose can lead to leaks or even an excessive accumulation of water within the washing machine. The process of replacing a washing machine drain hose is not overly complex.
  5. Here's the correct method to do it:a. Procure the appropriate replacement drain hose. These are readily available, but ensuring that the new hose has the same diameter as the current one will facilitate a smooth installation.b. Turn off the washing machine and move it away from the wall to access the area.c. Prepare a container to catch any excess water that might spill from the hose or machine during the process.d. The drain hose is typically attached to an outlet pipe at the back of the washing machine, often secured with a pipe clamp. Loosen and unscrew the clamp to detach the old drain hose.

    e. Install the replacement drain hose in its place. Keep the clamp on the new drain hose loose until the hose is securely in position. Then, tighten the clamp, making sure it secures both the hose and the outlet pipe.

    f. You can then guide the drain hose into the drain or connect it to the sink's drain, push the washing machine back into its original position, and power it on.

Pros and Cons of Washing Machine


  • Convenience
  • Time-Saving
  • Efficiency
  • Variety of Cycles
  • Large Capacity


  • Cost
  • Maintenance
  • Environmental Impact
  • Space Requirements
  • Noise

Differences Between Washing Machines and Dryers

Washing Machine

A washing machine is designed to clean clothes by agitating them in water or a special cleaning solution. It removes dirt, stains, and odours from the clothes.


A dryer is designed to remove moisture from freshly washed clothes, effectively drying them. It uses heat and airflow to evaporate the water remaining in the clothes.

Alternative to Washing Machine


A washboard is a traditional tool that can be used for scrubbing clothes by hand. It's particularly effective for removing tough stains.

Can You Extend a Washing Machine Drain Hose?

If you've recently purchased a new washing machine or have relocated to a new home and discovered that your washing machine's existing drain hose is too short to reach the drain, you have the option to either replace it or extend it.

Extending the drain hose is a straightforward process, and you can make use of various drain hose extension kits for this purpose.

We have another article that provides detailed guidance on extending a washing machine drain hose, which can be especially helpful in this situation. However, here are the fundamental steps:

  1. Turn off your washing machine and gently move it away from the wall to create space for the procedure.
  2. Install the connector between the two hoses, ensuring a secure connection.
  3. Utilize pipe clamps to secure the connector and hoses in place, preventing any leaks.
  4. Guide the extension hose into the drain or attach it to the sink drain, depending on your setup.
  5. Once the hose is in position, place the washing machine back in its original location, power it on, and conduct a test run to ensure that the extension works as expected.


When it comes to the question of "What Size Is a Standard Washing Machine Drain Hose?" it's evident that standard washing machine drain hoses typically have a diameter of 21 mm in the UK. While there may be variations in length, a common replacement size is 2.5 meters.

However, it's essential to ensure you have the correct size to fit your washing machine and that you replace or extend the hose as needed to avoid potential leaks and issues with your appliance.

Understanding the size and proper installation of a washing machine drain hose is crucial for maintaining the efficient operation of your washing machine and preventing water-related mishaps.


My name is Wisdom Bassey, I'm a blog content writer and graphic designer who provides support and services for brands and different companies. I'm young and versatile, A tech enthusiast. I carry out deep research on every topic I choose to write about. You can reach me through my social media handles, I'm always available and ready to connect.

Leave A Reply