These filters have a slightly shorter life than Dow finishers (#5 filter). I keep a Pentair in a 20" tall blue pre-softener and reverse osmosis. I'll keep at it for as long as the current reverse osmosis system lasts.
NANPU 1/2" NPT Air Drying System - 5 Micron Particulate Filter, 0.01 Micron Coalescing Filter, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl W/Metal Gauge
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