Plumbing

Waste Pipe Fall

Anonymous user 03/03/2024 - 3.36 PM

We're in the process of top-to-toe renovating a property. The upstairs bathroom hadn't been used for a long time so we stripped it completely. We decided on a layout with the original plumber who worked with us at the start (who is no longer on board) and subsequently bought all the fittings we wanted. We've now come to get another plumber in to install the bathroom, who has now informed us that because of the layout, the underfloor space (14cm) is not deep enough to accommodate the waste from the bath and shower because they're on the opposite side of the room from the waste (and the waste cannot be moved due to a conservatory in the way). This plumber suggested raising the floor (by 12cm), but my OH is tall and so this is not feasible once we've measured up, as he wouldn't be able to stand up in the shower. He stated that the gradient of the waste should be 10%/1:10, however the internet seems to suggest all sorts of gradients. At the moment, it seems impossible to install a functional bathroom so a) is the plumber erring on the side of caution with his gradient? b) any other ideas of how we can make this work??? Thanks.