Concealed Cisterns – Dual Flush & Single Flush If you have a small bathroom. If you’re creating a contemporary style, one of the best additions you can make to your design is a concealed cistern for your toiletConcealed cisterns sit inside the wall, with the bowl usually hanging directly from the wall itself. Here at Bathroom Shop UK, We have an exclusive range of concealed cisterns for your back-to-wall or Wall hung toilet today with the best deals online. Hence, You can Check out our other collection of modern toilets and traditional toilets.