How to Connect a Dishwasher and Washing Machine to one Waste Pipe
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How to connect a dishwasher and washing machine to one waste pipe

Join us as we learn how to connect a dishwasher and washing machine to one waste pipe. With great tips, guidance, different scenarios and much more.

dishwasher and washing machine togetherMany of us rely on our kitchen appliances on a daily basis to save us the time and energy of doing things manually, particularly our dishwashers and washing machines. Each will need a water supply, an electricity supply and a waste pipe. So, learning how to connect a dishwasher and washing machine to one waste pipe helps keeps things simple and efficient.

Read on to discover useful tips with sections focusing on how to connect a washing machine waste pipe and how to extend a washing machine drain hose.

Connection types for dishwashers and washing machines

It’s not surprising that running waste from your dishwasher and washing machine in the same waste pipe can mean less unsightly pipes leaving your property. This is especially important if they exit via a wall before going into the ground, and can help to eliminate an additional source of leaks should there be an issue at any point.

Also, as with all combined drainage systems, cleaner water can help clear the drains of any dirty water. In this case, the ‘grey water’ from your washing machine will help flush out any greases and fats that find their way into your dishwasher waste.

Wondering how to connect a dishwasher and washing machine to one waste pipe? There are two main ways in which this can be done:

  1. Double-spigot trap: Your waste is likely to leave your property through a ‘U bend’ similar to that on your toilet and beneath a sink. This will comprise a piece of vertical pipework, leading to a ‘U bend’ or trap. Double spigot traps are available, where the vertical piece of pipework is replaced with one that allows two connections, or spigots, into it – one being your dishwasher, the other, your washing machine.
  2. Splitter: The easier option, however, is where you leave your existing waste in place and connect the two wastes to a ‘splitter’. This acts in a similar way to the double-spigot trap but requires less plumbing expertise and might not prove as dirty a task.

Please note, both of the above are available at fairly low prices from plumbers’ merchants.

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how to install a washing machine hoseHow to install a washing machine drain hose

A drain hose funnels the waste from your washing machine into the ground. So, when fitting a new washing machine, it is a good idea to learn how to install a washing machine drain hose.

Bear in mind that washing machine outlets are generally universal, with similar connections. As such, most washing machine drain hoses purchased will come supplied with similar fitments.

In addition, most hoses simply screw on and are manufactured so that a tight connection is very easy, even for those who would normally struggle. If a jubilee clip is provided, use this to ensure an absolute water-tight fit.

How to connect washing machine waste pipe to sink

Washing machines require three different types of connection to function. These are electrical, water and waste. If your washing machine is located near your sink, it can be a wise choice to connect the washer to your sink waste.

Many people are unsure how to connect a washing machine waste pipe to a sink, but it actually isn’t too difficult. Plus, you get the added benefit of the grey water from your washer helping to eliminate grease and debris from your sink waste to drain a washing machine

To add a second waste (washing machine) to the existing one (sink), a spigot connection is typically required which will mean that the pipework originally taking one incoming pipe is now able to take two.

How to connect a washing machine waste pipe

All washing machines require a waste pipe connection to empty out the dirty water following each wash. Follow the guidance in our ‘how to install a washing machine drain hose’ section as a drain hose and waste pipe are the same.

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How to drain a washing machine

Washing machines work by pumping in water to use for each wash cycle. After your wash is finished, the wastewater should drain away. However, this doesn’t always happen. In this case, you can either hire a professional to come and remedy the issue or you can learn how to drain a washing machine yourself.

Follow the below steps if your washing machine is stopping mid-wash cycle and isn’t draining:

  1. Firstly, isolate any incoming power to the washing machine. (This may involve unplugging the washing machine or turning off the power supply to your home if the machine is wired in.)
  2. Next, turn off any water supply to the machine – remember there is usually both a hot and cold supply.
  3. Most washing machines have a drain tube. To locate it, you can search the model number on the manufacturer’s website.

    hose connected to washing machine

  4. You may need to unscrew the hose from the U-bend under the sink, remembering that this is likely to disconnect your sink waste temporarily too. Consider putting the plug hole stopper in to prevent people from using the sink in the meantime.
  5. Finally, pull the drain below the level of where the water is sat – this will likely have a siphon effect that will start to clear the water.

How to extend a washing machine drain hose

Every washing machine is different and drain hoses are available in a number of sizes online or at plumbing merchants. That is why when buying a new washer or moving an old washer, you may need to learn how to extend a washing machine drain hose.

It is worth taking your old hose shopping with you to ensure that you are purchasing a longer pipe with the right connections. You can then simply swap the hoses over yourself. Alternatively, connection joints are available that allow a new length of pipe to be added to the existing hose without the need for an entirely new length.

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Why won’t my washing machine drain?

If your washing machine waste uses a standpipe type arrangement, it may potentially freeze in the winter months. This will mean that regardless of how hot the washer being discharged is, you are likely to get a small flood in your kitchen or utility room. Consider lagging the pipe or perhaps pour a kettle of hot water over the pipe externally to ensure that the pipes are clear of icy blockages.

Once you are sure that frozen pipes aren’t the issue, follow the instructions in the previous ‘how to drain a washing machine’ section.

What if I get stuck or lost?

If you are a budding DIY enthusiast, it makes sense to try out new DIY skills using comprehensive guides. We hope that this particular guide will help make your project simpler but sometimes you may hit a wall. If you do reach the point where you are not sure how to progress, hiring a washing machine or dishwasher repair tradesperson is usually the best option.

This doesn’t mean you have admitted defeat, just that you are looking for extra guidance. You may even learn from watching. If you are ready to speak to a professional, please use our handy free search feature to be connected to qualified plumbers in your area.

Want to know more about washing machine repair? Check out our washing machine repair cost guide for prices and so much more. Alternatively, for further information about dishwasher repair, explore our dishwasher repair cost guide.

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