Waste pipe routing in new kitchen

[DazlerD]

Hi All

After a dispute with the kitchen fitters we have parted ways. I now have to setup the integrated dishwasher and add the door (plus a load of other stuff but not plumbing related). Should be straightforward as the Neff instructions are a series of images with screw hole positions on the diagram. However the fitter (meant to be a plumber) has run the waste for the washing machine, waste from the water softener, and the outlet from the water filter across the top of the dishwasher. The dishwasher needs to be raised until its nearly touching the worktop. It can't with these pipes in the way. This made me investigate the rest of his 'work'.

The Franke Siphon1 kit has been set up directly below the plug - not pushed back against the rear of the sink unit as Franke suggest. The middle part of this kit has been cut too short and a nasty white connector added to make it the right length. The pipe work outside is less than professional. I'm buying a new kit and can rectify all this.

The reason for the post is to find out how to 'properly' run the 3 pipes that are across the top of the dishwasher.

My kitchen layout is this:
Sink in the middle of the window 500mm unit. To the left of this integrated dishwasher, to the left of that a corner unit. coming back from the left of the corner unit the washing machine.
The washing machine waste goes into the corner cupboard at the top. There is a drop in the pipe before it exits the corner cupboard at the same level it went into the cupboard. Then it goes across the top the dishwasher into the sink unit and joins the waste pipe on one of the inlets.
The dishwasher waste goes across the top of itself into the sink unit and onto the other waste hole.

How should these waste pipes run? Should the pipes run along the floor, then go up the back of the sink unit, into the sink unit higher than where they join they siphon kit and then down?

Sorry about the length of this post, the actual question is quite simple i believe !!

Thanks

Darren

 

[JCplumb]

If you are referring to a flexible waste hose from the back of the appliance, then it needs to initially rise to its highest point, then run to the spigot on your sink waste any way that is convenient.
It is preferred by some to have a steady fall towards the spigot, but there's no recommendation from manufacturers for that, whenever I have phoned them regarding this very issue (to make sure my waste run isn't going to invalidate any warranties) they all say the same thing, 'go up from appliance initially then run waste to outlet'

 

[stevetheplumber]

appliance pumps are only powerfull enough to lift to the top of the appliance from there it should run downhill to the drain connection in practice often the best you can get is level for a while and then down
going along the floor and then up increases the amount of water your tring to pump and will cause problems with the machine
also the laying flat on the floor method leads to the pipe getting blocked as you will have stagnant water in the pipe between uses

 

[DazlerD]

Thanks for the replies. Unfortunately the pipe has to go along the floor and up into the waste in the sink unit because it has to pass behind the dishwasher. The dishwasher is virtually touching the back wall and there is no space above it, so all the pipes/hoses are sat in the recess at the back of the dsw.

If this is bad what are the alternatives?

 

[stevetheplumber]

eventually the pipe will block and it may cause smells in the wm

 

[rpm]

Water doesn`t flow uphill unaided and your talking of what 600mm?

 

[Radioman]

If the basin is on an outside wall (under the window) does the basin waste run through the wall and into an external drain or does the basin waste run internally into an internal 4 inch? If the1st why not just run all the wastes through the wall and into the drain is 40mm pipe and traps or inline hepvO?
BTW good luck fitting the integrated door