DIY Kitchens - waste pipes

[Macdo]

Our fitter is having a bad afternoon - the units from DIY Kitchen we bought don't have enough space behind them to fit the waste pipe. There's a 5cm gap behind the sink for the water pipes, but with the dishwasher in place, the integrated door would be almost 2cm proud of the unit line.

I believe this is a known issue with IKEA kitchens - and so you need to put the pipes in the wall. But in all the reviews I've read of DIY I've never seen a problem with waste pipes.

Anyone got any experience of this? He's about to start cutting the waste into the wall but he's far from delighted on a warm Friday afternoon!

We did not have this issue. Did you buy the right unit?

How can it be a problem with the unit if the dishwasher door is too far out? Isn’t it the dishwasher that’s too deep?

Assuming its a standard dishwasher I also can't quite follow why the fitter is having an issue.

The issue with Ikea kitchens is they have absolutely no void at all to stash the pipes in, but this refers to pipes behind units, not behind appliances. Appliances don't have a unit behind them so the void is irrelevant.

DIY kitchens definitely have a void (the reason I'm not buying them as I want to maximise space)... but again this would be irrelevant to the dishwasher.

I'd just stay away from grumpy trades person and let him figure it out. This is quite literally what you pay them for!

Indeed, and I hid myself in the living room while he tutted and mumbled and sorted himself out.

The dishwasher is a standard size - what he didn't know until he lined the units up was that the waste pipe needed to be behind the sink unit (which has a 5cm gap built behind the unit) rather than behind the dishwasher itself (as this pushes the dishwasher too far forward to be in line with the rest)

Problem pretty much resolved - or it will be on Monday when he's back!

I think he only has himself to blame for that one... in my (exceptionally limited hodge bodge) experience, the soil pipe from a dishwasher always goes into an adaptor on the soil pipe of the sink.

I'm almost certainly over simplifying but would have expected an experienced kitchen fitter to foresee the issue. Does he do a lot of kitchens? (Perhaps avoid recommending him to anyone considering an Ikea kitchen )

I agree with @Muststopeating. Dishwasher usually sited next to sink and connectors got to the multi point connector under the sink. Never had anything else so I would have thought he should have checked

No problem with our DIY kitchen. Integrated dishwasher lines up perfectly.

I don't understand that

it is quite common to notch or drill kitchen units so pipes can pass behind or through them

notches are better because it enables you to push the units in or pull them out without threading the pipes through a hole

any kitchen fitter or plumber will have done it hundreds of times.

Dishwashers are particularly large but you can sometimes squeeze something behind them at skirting level.

I'm pretty clueless tbh - not our first kitchen installation, b it we've always paid someone to fit so the details have never been something we've focused on. Until I got home yesterday to be told "we have a problem".

I think he's tried putting in three waste pipes - one for the sink (which is staying where it was) and one for each of the two new dishwashers, which are going either side of the sink. Then when you put the dishwashers in place they have the waste behind so stand out from the line they should follow. He's dug a bit into the wall behind which has reduced the problem, and proposes to pull everything c. 1cm out front he wall to solve the rest, so everything lines up again.

Those talking about waste for the dishwasher going into a connector behind the sink - does the waste come out the side of the dishwasher of the back?

The other thing is our worktop - we've gone a company coming to template this week. Now we're a cm out from the wall are we going to face a smaller overhang than we should? Or do they just cut to size so we might need 61cm instead of 62cm for example?

the waste hose for a sishwasher usually comes out of the bottom and emerges at the back where there is a bit of a gap. Mine goes sideways and runs towards the waste pipe beside the sink. It has to raise in a loop up to worktop height to prevent dirty sink water draining into the dishwasher. A superior method is to have a vertical standpipe attached to the waste with its own trap, rather than connected to the sink waste.

if you can have a wider worktop, it will look better.

they may charge you more as they will have to cut it from a bigger size

post some photos of your pipe problem if you can

The worktop people will make a template to suit what is there. Shoukd be ok.

I'll give it a go, @PigletJohn , just need to pull the appliances out to get in there.

what's the floor covering?

Two dishwashers! Excellent decision, will be doing exactly the same with our new kitchen (one of my favourite ever suggestions from MN).

@PigletJohn

what's the floor covering?

Newly tiled floor

ok, to prevent scratches, you can lay cardboard or newspaper. tilt it back a bit so you can push it under the front feet. An old dry towel would also do.

new clean tiles are naturally hard and smooth so do not need lube.