Can a 40mm waste pipe fit into the service void in kitchen

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Hi

I'm having a B&Q kitchen fitted and there's a dishwasher and washing machine to be plumbed in.

Fitter wants to plumb them all under the sink. We would rather not have it done that way as it reduces even further the space under the sink for storage.

I want the the cold supply and the waste to run in the service void behind the cabinets but he reckons the 40mm waste pipe won't fit in the void (can 32mm be used with an adaptor where it joins the 40mm run?) and also that the waste needs to be accessible in case of leaks.

The dishwasher is integrated but the washing machine is not. The appliances are next to each other. I think it should be fine for extensions to the plumbing to be made and everything to be connected behind the washing machine with the wastes secured with jubilee clips. I could access this plumbing but pulling the washing machine out and i wouldn't lose as much space under the sink to a nest of pipes.

Am I wrong?
 
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Let your fitter do it his was. You will want all the connections under the sink as when there is a problem you can get to all pipe work. Pulling out the washing machine and dishwasher is not fun when try to trace waste and water supplies.

Andy
 
Let your fitter do it his was. You will want all the connections under the sink as when there is a problem you can get to all pipe work. Pulling out the washing machine and dishwasher is not fun when try to trace waste and water supplies.

Andy

i agree 100%, have been to bad leaks behind wash machine or dishwasher, where the punter has ripped the flooring trying to get the machine out in a hurry, i plumb EVERY connection into adjacent units including stand pipes for wastes for 2 reasons, firstly because it is the right way to do it, and secondly it maximises room behind machines to allow machines to fit right back, and if you have a wee problrm with a leak or spillage from the waste pipe because of a choke etc better a packet of soap powder or a few cloths get wet and alerts you to the prob rather than months later when the oak flooring is squelchy from a slow drip behind a machine
 
Okay I'll have to defer to the professionals on this one. I was concerned that he just didn't fancy the extra work.

What exactly does go in the service void then? I'd rather have more cupboard space then a void which isn't used.
 
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What exactly does go in the service void then? I'd rather have more cupboard space then a void which isn't used.
Wasted space left - as far as I can fathom - because the kitchen unit manufacturers and fitters don't want the work of making the units fit the walls. By fitting a back to the units, they can be left clear of the wall a little bit, and so don't need to "fit" anything to walls which may not be flat and straight.

In my parents house, the kitchen was fitted out with custom built units - took dad ages, but he's pretty good with the woodwork. So there's no gap behind them, and no wasted space.

I'm sure some people will argue that the backs in the units hide "untidy" plumbing, but I think that shows a lot about the expectations for workmanship from sections of the trade :rolleyes: Well done plumbing shouldn't be untidy ;)
 

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