How to Extend a Portable Dishwasher Hose?

Portable dishwashers are designed for the convenience of use even in the smallest spaces and for portability – to roll it away between uses or take it along on your travel.

However, these appliances often come with hoses no longer than two feet. This requires using your portable dishwasher next to your sink, which can be a cause of inconvenience, depending on the kitchen set-up.

In such cases, how to extend a portable dishwasher hose?

To extend a portable dishwasher hose you have to buy the necessary equipment and do it yourself. Specific extensions are rarely available and hard to find. Extending a portable dishwasher hose offers convenience, but can cause issues like reduced water pressure and leaks.

To prevent backflow, use a check valve. Alternatively, convert to a built-in model or install a new water source.

Let’s look into the different ways to extend the hose of your portable dishwasher and some alternatives for a hose extension.

Can You Extend a Portable Dishwasher Hose?

It is possible to extend a portable dishwasher hose. However, it may require some additional materials to ensure proper functionality.

Let’s have a look at the benefits of extending your portable dishwasher hose:

  • Increased Flexibility:
    When you extend the hose, you have flexibility regarding where you’d like to position your dishwasher.
    This is especially useful if your kitchen layout or plumbing setup requires the appliance to be placed at a distance from the sink.
  • Added Convenience:
    A longer hose allows you to connect your dishwasher to the water source that you intend to use for the water supply.
    This makes installation and daily use easier.

Despite these benefits, extending a dishwasher hose also has some drawbacks, including:

  • Risk of Leaks:
    There is an increased risk of leaks when you modify or extend a hose. Water can leak if the connections aren’t properly sealed or tightened. This can cause potential damage to your flooring.
    We found even 19 Reasons Your Portable Dishwasher May Leak and explained how to fix it.
  • Decreased Water Pressure:
    An extended hose can result in a decrease in water pressure.
    This is because it can be hard for the dishwasher’s pump to maintain the same water flow for a longer hose than it was designed to deal with.
    Insufficient water pressure will impact the dishwasher’s performance.
    Check our Portable Dishwasher Water Pressure Guide for detailed information.
  • Complex Installation:
    Extending a portable dishwasher hose involves additional plumbing work, including the connections and extensions.
    If you have limited plumbing knowledge or experience, it can be a challenging task.
    Moreover, it could cause leaks or other dishwasher issues if incorrectly done.
  • Increased Fill and Drain Times:
    Extending hoses may increase dishwasher fill and empty times. The water level sensor keeps the pump activated until all the water empties from the machine.
    It also ensures no additional water fills the machine beyond the normal operating quantity.
  • Hose Kinking:
    Longer hoses are more likely to bend or kink and obstruct the water flow.
    This, in turn, can disrupt the dishwasher’s operation.
    Proper support and placement of the extended hose can help minimize the risk of kinks.

There are a few different ways you can extend your dishwasher’s hose. While it’s mostly DIY, sometimes, extensions might be available but might not work well.

How to Extend a Portable Dishwasher Hose?

Before you get started with the hose extension, either make a note of the hose dimensions or take the hoses to the store. Based on the dimensions, you can figure out the size of the coupler and metal clamps required (depending on the method you select for extension).

To purchase the required materials and tools for an extension, visit any hardware store (online or physical stores) or the plumbing department of a home improvement store.

Since the dishwasher has two separate hoses for the inlet and drain, you must purchase the desired hose lengths for each type.

Here are some ways to extend a dishwasher hose:

  • Hose Extension Kit
    This is the recommended method of extending hoses. Such kits contain a coupling or connector piece that you can use to join two hose sections together.
  • There may also be additional clamps or fittings to ensure secure connections.

    Follow the instructions provided with the hose extension kit to connect the hoses properly.

    It often involves placing the hose extension tube into the hose connector piece and securing it with a clamp.

    Then, place the end of your existing hose into the loose end of the hose connector, and secure it with a clamp.
  • PVC or Vinyl Tubes
    You can purchase PVC or vinyl tubing of the required length and with a matching diameter to your existing hose.

    Connect the existing hose and tubing with hose clamps or appropriate fittings, ensuring a tight connection.

Techjut tips:

  1. If you’re unsure how to extend a portable dishwasher hose, consult the manufacturer’s instructions or ask for professional help.
  2. Unplug the machine from the power supply before starting the hose extension process.
  3. Run a quick wash cycle after the change to test for leaks and ensure the extended hoses are secure.

Bonus: A Check Valve Can Be Useful

To prevent any additional water from the extended hose from flowing back into the dishwasher, consider using a check valve on the drain side of the dishwasher hose near the pump.

This is useful when you extend the dishwasher hose since additional water in the hose may flow back into the dishwasher when the draining process stops. As a result, residual water will remain at the bottom of the dishwasher and may affect cleaning performance.

Installing a check valve near the pump allows water to flow out during the draining process but prevents water from flowing back into the dishwasher.

Alternatives for a Hose Extension

If you aren’t keen on getting a portable dishwasher hose extension, here are some alternatives that you can consider:

  • Make it Built-in:
    Rather than extending the portable dishwasher’s hose, you can convert it into a built-in dishwasher.
    Although this process requires extensive modifications to your kitchen setup, it will provide a permanent and seamless solution.
    Read Can a Portable Dishwasher Be Built In to learn the 6 requirements we defined.
  • Convenient Plumbing Setup:
    Consider installing a new water line in the preferred position, so your dishwasher is conveniently closer to the water source without wheeling it around.
    While this requires more effort and possibly professional assistance, it is the best option for a long-term solution without needing hose extensions.


Extending a portable dishwasher hose offers increased convenience and flexibility on where you can position your dishwasher. While you can use methods like a hose extension kit or PVC or vinyl tubing, there are potential issues that require attention.

An extended hose may cause reduced water pressure, increased risk of leaks, and hose kinking. Incorporating a check valve on the drain side close to the pump will help prevent additional water from flowing back into the dishwasher through the extended hose.

Alternative solutions to hose extension include converting the portable dishwasher into a built-in model and installing a new water source according to your convenience.