SMC (6850090) 685 Series PVC NSF Check Valve ; 1/2"FNPT x 1/2"FNPT Buna - Pack of 3 GE Desal Residential RO Membranes Factory standardized

Factory standardized

T28 push-fit caps allow tool-free installation and removal

while the weak base anion layer captures negatively charged contaminants except CO₂ and silica

Replace 50 GPD membrane when TDS readings increase or water production slows significantly

SMC (6850090) 685 Series PVC NSF Check Valve ; 1/2"FNPT x 1/2"FNPT Buna - Pack of 3 GE Desal Residential RO Membranes Factory standardizedSMC 685 Series NSF Certified Check Valve SMC 6850090 PVC Check Valve 3 Pack NSF rated check valve for reliable backflow prevention in RO systems and water treatment applications NSF Certified PVC Construction 1 2" FNPT Threaded Connections Buna N Seal Material Pack of 3 The SMC 685 Series check valve prevents reverse flow in residential and light commercial water filtration systems. Built with NSF certified PVC body and Buna N seals, this valve