The purpose of this 110mm soil access plug is to allow the soil pipe system to be inspected and cleared in the event of any blockage.To use the access plug simply remove the cap by unscrewing it from the threaded projection on the fitting. This could potentially release any blockage above the cap so it is always advisable to stand aside at this point!Access caps have a plain spigot end at the bottom, to enable them to be connected into the socketed end of another fitting or pipe as required. They can be installed either vertically or horizontally as required.