Single Filtration System, for ice machines, 21,000 gallon capacity, recommended for ice machine capacity up to 500 lbs, 2 GPM flow rate, 30-100 PSI operating pressure, 35-100°F operating temperature range, 0.5 micron rating, for reduction of scale, chlorine taste & odor, 3/8″ inlet & outlet size (including water pressure gauge), NSF