Viqua (QSO 410) Replacement Quartz Sleeve for UV Systems Watts (RC C BB 20 50) 20"x4.5" Clear Empty Refillable Cartridge } The Pentek RFC20 BB is } The Pentek RFC20 BB is a 20" x 4 Product Name Sensafe WaterWorks Zinc Check II Test Strips Model Number 480026 Test Parameter Zinc (Zn) concentration in water Test Method Patented colorimetric dip and read strip technology Test Duration 23 seconds total (3 second dip + 20 second color development) Training Required None—visual color matching system Equipment Required None—no glass vials #1a5276 100%) webkit font smoothing:antialiased
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Viqua (QSO-410) Replacement Quartz Sleeve for UV Systems Watts (RC-C-BB-20-50) 20"x4.5" Clear Empty Refillable Cartridge } The Pentek RFC20-BB is