I think he was talking about how he has to carry water up to the loft in order to use his shower. It's a gravity system with just a jug of water above the shower which falls when he opens the tap (or it looks like just a PVC tube in his case). Though since he's in a trailer I'd guess he's not hooked up to the sewage system.. would guess it's similar to an RV in that sense. But he never discussed that in the interview.