SMC (6460090) 646 Series Brass Check Valve ; 3/8" FNPT x 3/8" MNPT Hanna (HI70032P) 1382 PPM @ 25C TDS Calibration Solution Blue & White F-451 series

Blue & White F-451 series has been the industry standard for water treatment flow monitoring since 1988

5" length with 4" diameter provides extended capacity and higher flow rates than standard cartridges

The piston must be installed in the correct rotational alignment with the cam gear drive lug

but the LED will continue flashing as a reminder

SMC (6460090) 646 Series Brass Check Valve ; 3/8" FNPT x 3/8" MNPT Hanna (HI70032P) 1382 PPM @ 25C TDS Calibration Solution Blue & White F-451 seriesSMC 646 Series Brass Check Valve 3 8" FNPT x 3 8" MNPT Prevents backflow in residential and commercial water treatment systems with reliable spring loaded brass construction Model 6460090 3 8" NPT Connections Lead Free Brass WHY IT WORKS One Way Flow Protection Spring Loaded Mechanism Internal spring ensures positive closure and prevents reverse flow even under variable pressure conditions Brass Body Construction Lead free brass housing resists