The 110mm Terracotta Back Inlet Gully Circular Lid has a 2nd inlet & is generally used in the middle of a pipe run such as a line of drainage on a patio. In these situations the gully should only be used for stormwater or rainwater & not foul drainage. The back inlet bottle gully has its own water seal to stop odours from coming out of the drainage/sewer system & by removing the grid & internal funnel acts as an accessible rodding point. The gully has two 110mm push-fit socket which can be connected to either spigots from bends or underground drainage pipes. The spigot on the hopper allows upto 32mm height adjustment.