Fixed or movable apparatus and installations for treating water, namely, water and wastewater purification units, softening units and filtration units; Fixed or movable apparatus for purifying water; Fixed or movable apparatus for filtering water; Fixed or movable apparatus for water softening; Fixed or movable filters for treating liquids, namely, water and wastewater purification and filtration filters; Fixed or movable filters for purifying liquids; Fixed or movable filters for softening of liquids; Fixed or movable filters for filtering of liquids; Fixed or movable filtering cartridges for treating liquids, namely, water and wastewater purification and filtration cartridges and for purifying, softening and filtering of liquids