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How to Plumb in a Washing Machine

Learning how to plumb in a  washing machine is fairly straightforward if you are putting it in place of an old one.

If you are quite good at DIY, then you will probably be able to fit a washing machine without the need to ring a plumber.

If you are fitting it into a new place and have not fitted one before, you will most likely need to ring a plumber.

First of all, make sure you remove the transport bolts that are screwed into the back of the washing machine.

Then, there 3 things to consider –

  1. Cold water supply (maybe hot also)
  2. Waste pipe.
  3. Electrical socket.

Cold water supply

You need to make sure there is a cold water supply close to where you want the washing machine installed. There needs to be a washing machine valve on the cold water pipe to be able to connect the washing machine to your water mains supply via a flexible hose, normally around 1.5 meters in length.

Most washing machines nowadays only need a cold water supply. If your old washing machine has a cold water supply and a hot water supply, then you can just leave the hot disconnected when fitting the new washing machine.

You might want to screw a 3/4 inch blank nut on the old hot washing machine valve after removing the hose to make sure it does not leak in the future.

Waste pipe

You will also need a waste pipe near to where you want your washing machine fitting. This should be a standpipe with a trap on the bottom where you can poke the flexible waste hose into or you can run it to a sealed waste pipe connection under the sink.


Then you just need to test all pipes for leaks.

If you want your washing machine fitting in a place that is not close to any of the pipes needed, then you will need to run new pipes to the washing machine.

Electric socket


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