SMC (5722390) 426 Series PVC NSF Check Valve ; 1/8" FPT x 1/8" FPT VITON 3.5M KCl + AgCl 4 x 30 mL bottles while the proprietary GreenBlock technology

while the proprietary GreenBlock technology ensures consistent performance throughout the filter's service life

5 inch dimensions fit standard big blue housings from Watts

Remove the old filter cartridge and clean the housing sump with mild soap and water

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SMC (5722390) 426 Series PVC NSF Check Valve ; 1/8" FPT x 1/8" FPT VITON 3.5M KCl + AgCl 4 x 30 mL bottles while the proprietary GreenBlock technologySMC 5722390 426 Series PVC NSF Check Valve 1 8" FPT threaded check valve with VITON seal for reliable backflow prevention in water filtration systems NSF Certified PVC Construction VITON Seal 1 8" FPT Connections The SMC 426 Series check valve ensures one way flow in reverse osmosis and water filtration systems, preventing backflow contamination and protecting upstream components. Built with NSF certified PVC and a durable VITON O ring, this compact