The UFOX 10 sludge water recycling unit is a ready-to-use system to treat refill water. The unit consists ofthe treatment stages of pre-filtration, ultra filtratio nand disinfection. Ultra filtration is the central treatment stage carried out with two powerful UF modules. Therefore it is possible to return the filter backwash treated in this way – the filtrate – to the pool cycle. It corresponds to the operating water type 1 defined in DIN 19645 “Treatment of sludge water from systems for treatment of water of swimming pools and baths” and meets with the highest requirements of this DIN standard. The returned filtrate volume – and that of the saved water – is displayed on a water metre integrated into the unit.