"Dave D" wrote
| I am moving my kitchen, I was looking at issues around trying to run a
| waste pipe through joists.
| Dont fancy that much, I am going to have a run to the main waste pipe
| with of around 10 metres. I fancy getting one of these masher pumps,
| looks ideal no down slope required and uses smaller pipe.

AIUI although they will pump uphill immediately after the pump the pipe
*does* then require a slope down to the drain. Otherwise there would still
be standing water/gunge solidifying in the pipe.

Owain