Alternative 1 micron RV Unit	Single RV Water Filtration Unit. Comes with a 1 micron carbon cartridge (Replacement Part Code - A-AC1{421}), a housing spanner, bracket and a silver cannister (Replacement Part Code - SSC10 {702}).  Comes with 1/2" BSP fittings. This unit uses the 'Alternative' sanitisation medium. QTY: