Proq-550 Reverse Osmosis Filters 1Year Set, 5 Stage Reverse Osmosis Water Fil... Culligan AC-50 Reverse Osmosis System It works well as a

It works well as a pre-filter for reverse osmosis systems

duplex units

Install pressure gauges before and after filter housing

Amtrol 143-198 RO Steel Pressure Tank 14 Gallon

providing upgrade path for older Viqua UV systems

Proq-550 Reverse Osmosis Filters 1Year Set, 5 Stage Reverse Osmosis Water Fil... Culligan AC-50 Reverse Osmosis System It works well as aAnnual 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.