SMC (6870090) 687 Series PVC NSF Check Valve ; 3/4"FNPT x 3/4"FNPT Buna Quantity:Pack of 2 Use with filters in carbon

Use with filters in carbon block

Fill the sample cuvette with 10 mL of water sample to be tested and zero the photometer with the blank sample

Universal cap design ensures compatibility across Omnipure E-Series housing systems

5" cartridge format

High-capacity GAC removes chlorine taste and odor

SMC (6870090) 687 Series PVC NSF Check Valve ; 3/4"FNPT x 3/4"FNPT Buna Quantity:Pack of 2 Use with filters in carbonSMC 687 Series 3 4" FNPT PVC Check Valve with Buna Seals Glass filled polypropylene construction with low 1 PSI cracking pressure for reliable one way flow control NSF Certified 125 PSI Max 17 GPM Flow Viton Seals The SMC 6870090 check valve prevents backflow in RO systems, booster pump installations, and pressurized water lines where maintaining directional flow is critical. Install downstream from your pump to eliminate water hammer and protect