In article ,
John Stumbles writes:
Aidan wrote:

I think Grundfos do a pump type device for drains, similar to a
macerator but without the turd shredder. A tank, pump, float switch &
relay could be rigged up by someone competent.would

I think saniflow do one too.

Flygt might also -- they're into sewage, but possibly only
on a bigger scale.

--
Andrew Gabriel