On 06/07/2015 13:44, Phil L wrote:
They mean using a saniflo.
You'd have to run mains water down there and electricity, although the
electricity would presumably be there anyway for your radio equipment.
It then requires a waste pipe running back to the drains, this is normally
about 25mm

snipped

With a bit of ingenuity and some valves, you could half-duplex a single
pipe to take water in one direction and sewage in the other.

Cheers
--
Syd