SMC (6850090) 685 Series PVC NSF Check Valve ; 1/2” FNPT x 1/2" FNPT Buna 20 inch x 4.5 inch Big Blue Filters2774 Simultaneous GPM and LPM markings

Simultaneous GPM and LPM markings for flexible measurement across different system specifications

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SMC (6850090) 685 Series PVC NSF Check Valve ; 1/2” FNPT x 1/2" FNPT Buna 20 inch x 4.5 inch Big Blue Filters2774 Simultaneous GPM and LPM markingsThe SMC 6850090 from the 685 Series is a PVC check valve rated for potable water systems, featuring 1 2" female NPT connections on both ends and a Buna N seal. This NSF certified component prevents backflow in residential and light commercial reverse osmosis systems, ensuring one way flow protection where you need it. SPECIFICATIONS SMC 685 Series Check Valve Technical Details Model Number SMC 6850090 Series 685 Series Body Material PVC (Polyvinyl