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Vacuum-Based Toilets from Norway Use 90% Less Water
Our sewage infrastructure is not designed for toilets like this. They are designed with solids being conveyed by liquids. Remember the first law of sewerage design: never let your liquids outrun your solids. Without liquid to keep the solids moving you have blockage.
They, the most robust ones, have been in use in large vessels for a long time but their maintenance is hell and are prone to failure (due to vacuum filters becoming clogged). That is the reason it haven’t made a dent in places conventional toilets work fine (straight gravity pull and water). This is just one with an slicker slicker external design that should only be used in land where there’s a lack of running water.
So when your toilet goes out you just have to wait a few months for a new vacuum pump to come in and open up the wall it sits behind, replace it and patch up the hole. Livin' the dream.