Distance from drainage/water supply

annabanana · 6 Jan 2007

Hi.
I hope someone might be able to help. We'd like to install a dishwasher in the kitchen of the house we've just moved into. There's no room for the washing machine and dishwasher near the sink, but one of them could be moved to the other side of the kitchen with pipes running under/behind the units. Would this work? How far from the drainage and water supply can the appliance be? Does it matter?
Any thoughts would be gratefully received.
Thanks,
Anna

jj4091 · 6 Jan 2007

It does not matter from the water supply side, but you would need to be able to get sufficient fall on the drain pipe. You will also need a convenient socket.

annabanana · 7 Jan 2007

Thanks that's really useful. The socket bit is fine too. Can I just check - what does sufficient fall mean exactly? A continuous slope to the end or something else?
Thanks again.
Anna

trotters · 7 Jan 2007

The best way is to extend the drainage pipe TO the appliance rather than trying to extend the drain hose FROM the appliance.

Using this method, the drain pump of the appliance won't be over worked, also if you are extending the supply pipework it is a good idea to make sure you can access the taps without having to drag the appliance out (In case of a leak etc).

Ash-GT · 24 Jan 2007

Firstly, great site. This is my first post, so be gentle!

I have exactly the same problem, and thought of piping to the new applicance, however, space under the kitchen units is limited, and it is only possible for me to get a 1cm fall over 1m (total distance is about 4 meters).

However, after looking at a friends kitchen install (who had a similar type of problem - from MFI), they simply used an washing machine extension hose and a 5m water pipe to solve the issue.

His kitchen has been in for about 2 years, and they have never had a problem.

I am now thinking to go down the MFI route, and simple use extension pipes?

EVER-PURE · 24 Jan 2007

For the drainage the size of the pipe and trap has to be 40mm, the maximum distance is 3 metres from the stack and the gradient is 18- 45mm per metre

Ash-GT · 24 Jan 2007

EVER-PURE said:
For the drainage the size of the pipe and trap has to be 40mm, the maximum distance is 3 metres from the stack and the gradient is 18- 45mm per metre

That would explain it. No chance of getting that gradient under your average kitchen unit!

MickUK · 5 Jan 2008

Hi all, first post & a cracking site! Sorry to drag up an old thread but i'm having the same probs. Had to move the dishwasher due to buying a bigger cooker. When it's said extend the drainage pipe rather than the hose, are we talking about the 40mm plastic piping?

Cheers all!

Mick

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Distance from drainage/water supply

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