The AquaFilter Familyunit is fastened to the container, such as the Aquabox or a bucket, and delivers drinking water directly into the user's cup. The filter delivers up to 1 litre a minute, so the user has only to pump to get water on demand. Aquabox has had units on field test now for over three years in African and Asian countries, and these show that that the AquaFilter unit is capable of delivering at least 18,000 litres; enough for 22.5 litres/day of general use potable water for use by the family group for a period at least eighteen months (and often longer).
A washable gauze pre filter, first removes the larger particles, before the membrane removes the smaller biological contaminants. The membrane is continually washed by an internal cross-flow system.
Periodic maintenance includes greasing the pump seal, for which a suitable grease store is built in; replacing the pump seal, for which spare seals are already attached to the piston rod; and chemical washing, for which a pot of tablets is attached.
The unit fits into an Aquabox Gold together with the nearly 70 other items of humanitarian aid. The box itself is made from a strong and robust plastic, and itself becomes a valued resource for dry storage and other flexible uses when once deployed in the field to desperate families, groups and communities.