SMC (6870090) 687 Series PVC NSF Check Valve ; 3/4"FNPT x 3/4"FNPT Buna Quantity:Pack of 2 Universal cap design ensures compatibility

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

phosphate media for scale and corrosion control in residential and commercial water systems

5" cartridge format

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

This version ships without the internal flow restrictor button

SMC (6870090) 687 Series PVC NSF Check Valve ; 3/4"FNPT x 3/4"FNPT Buna Quantity:Pack of 2 Universal cap design ensures compatibilitySMC 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