The 110mm Black Soil Manifold Socket is ideal for connecting up to 4 additional waste pipes to the soil stack. The product is supplied with 1 open adapter and 3 closed that will allow to allow 32mm, 40mm and 50mm waste pipes to be connected to the soil stack. For connection simply push 32mm or 40mm into the open adapter or remove the blanking plug from the three closed adaptors and push the pipe in to the adaptor. For 50mm waste pipe trim the adaptor to marks indicated on the adaptor. The soil boss pipe has a spigot at 1 end which should always form the lower joint.