QTCR-4 Water Filter System, Quad, (4) CTO-QCR2 activated carbon cartridge, reduces chlorine & sediment, outlet pressure gauge, water shut-off valve, bypass valve, mounting bracket, chloramine reduction, 40,000 gallons, 6.8 gpm, 5 micron, 3/4" inlet, 3/4" outlet, NSF 42 (170-52134)