Small bathroom - feasible layout?

Question

With a tiny (5' by 6') bathroom we never have enough space. Current layout is like this:

Is the following feasible? Particularly in terms of drainage from the shower?

Currently the bath "waste" is directly by the window (where the waste for the toilet etc goes to outside) so there isn't any need to take it across/under the floor. I don't think there is any pipework "under" the floor currently.

Is it an option to have pipes above floor level but boxed in - would be happy with that.

I don't have a great deal of wall space as one wall is windows the whole width of the room (about 12" above the level of the sink/cistern).

Is there another layout (in general terms) you would recommend? My aim is really just to have a sense of more space and to have enough storage, (we're not concerned with keeping the bath) I realise it's a really small space.

Answer 1

Is it an option to have pipes above floor level but boxed in

Yes.

But if the hot and cold water supply pipes in and are metal (copper) and have supplementary equipotential bonding - I think you need to make sure the bonding clamps are easily accessible without tools. Ditto for isolating valves (for when you want to replace taps).

You don't need much slope on the horizontal runs of the waste pipe (and too much slope is bad) I read 1 in 40 to 1 in 110 somewhere.

I've boxed in pipework minimally but if I did it again I'd try to make more of a feature of it - cupboards with useful storage space as well as access to pipes.