The McAlpine USG3 Untrapped Gully is a plumbing fixture that features a tile/grating with a removable grid and a 1 1/2" horizontal outlet. It is designed to be used as a floor gully in wet room areas or shower areas. The untrapped design means that it does not include a water trap to prevent odors and gases from the drainage system from entering the room. As a result, proper ventilation is necessary to prevent unpleasant odors and gases from entering the room. The tile/grating with a removable grid is designed to provide a stable and secure base for the gully while allowing for easy access to the waste trap below. The tile/grating is made of high-quality materials that are resistant to corrosion and chemical damage, ensuring durability and longevity. The 1 1/2" horizontal outlet allows for easy connection to standard 1 1/2" pipework, making the McAlpine USG3 suitable for a variety of drainage systems. Overall, the McAlpine USG3 Untrapped Gully, Tile/Grating with Removable Grid, 1 1/2" Horizontal Outlet is a reliable and efficient plumbing fixture that is designed to provide effective drainage for shower and wet room areas. It is similar to the McAlpine USG3SS and USG3T6SS, but with a different cover and grating. However, it is important to note that the untrapped design of the gully means that odors and gases from the drainage system can enter the room, so proper ventilation is necessary to prevent unpleasant odors and gases from entering the room.