Proq-550 Reverse Osmosis Filters 1Year Set, 5 Stage Reverse Osmosis Water Fil... Culligan AC-50 Reverse Osmosis System 75" hole pattern

75" hole pattern

Inspect and lubricate the o-ring

Verify your housing cap bolt pattern measurements before ordering

Dual-opening design with high-capacity screen for reduced pressure drop and extended run time

Proq-550 Reverse Osmosis Filters 1Year Set, 5 Stage Reverse Osmosis Water Fil... Culligan AC-50 Reverse Osmosis System 75" hole patternAnnual Replacement Kit PROQ 550 1 Year Filter Set Complete 5 stage replacement cartridge package for PROQ 550 reverse osmosis systems 5 Filter Stages 12 Month Supply OEM Compatible Quick Change This annual filter set includes all cartridges needed to maintain your PROQ 550 undersink reverse osmosis system for one full year. Replace sediment and carbon pre filters at 6 12 months and the RO membrane at 24 36 months depending on water quality and usage.