Kitchen plumbing conundrum?

[Aparki]

Hi - some advice wanted. I am putting in a new kitchen that will be in a kitchen extension put in in the 1970s. When the builders installed it they did not plumb it in for a sink but left it in the original location - they did put in electrics and a radiator but not a sink. I cannot work out why. I want to move the sink into the extension and place it under a window. Two challenges:

- The floor is concrete over a DPC. Can I dig channels to run the water across the floor (from old sink location) or do I need to go all the way round three sides of the room? I want to fit an Ikea kitchen (no service voids)so round the room might be a challenge.

- Can I run the waste pipe through the floor? I think fall(?) might be an issue / impossible. Alternatives are outside and run the waste back round three sides of the extension to the only drain or a soak away (is that feasible or just lunacy?)

Thank you

 

[stardanny]

Can't you install a gully and run to drain / manhole?

How far is it from new location to existing waste pipe?

Daniel.

 

[Aparki]

Dan, thanks - can a gully run level or does it too have to slope? The sink will sit under a window on one side of the extension and the nearest (and only) drain is on the other side - it would be about 10m to go around the extension. Not sure but getting a gully to slope sufficiently means I will have to dig quite deeply? I could run the waste pipe all the way around on the wall, at a slope, relatively easily but it will look ugly and I can't see how I might conceal it unless I plant stuff to hide it.

 

[Hugh Jaleak]

110mm drain from the gulley can drop to as shallow as a 1:100 fall, forget any dies about a soakaway, it is waste water and must discharge to a foul drain. I suspect that was why the sink wasn't moved when the extension was originally done as drainage was a problem.....