This waste reducer can be used to connect aandnbsp;waste pipe into 110mm soil pipe.When a waste pipe is connected directly to a 110mm soil pipe via a short run of pipe in conjunction with a boss adapter, there is always the possibility of trap failure due to induced siphonage. To guard against this it is always safest to use an anti-syphon trap on the sink, basin or bath that is being connected.Waste reducers have a plain spigot end to enable them to be connected via push fit into the ring seal socket of another fitting or pipe as required.To be used in conjunction with a boss adaptor in the size you require.Solvent Weld Soil Boss Adaptor - 32mm GreySolvent Weld Soil Boss Adaptor - 40mm GreySolvent Weld Soil Boss Adaptor - 50mm Grey