SMC (6850490) 685 Hastelloy Poly Check Valve 1/2" NPT 20 inch x 4.5 inch Big Blue Filters2700 Valve closes automatically

Valve closes automatically

Pre-Measured

Built with K MONEL internal components for superior corrosion resistance and a one-piece machined acrylic body for visual clarity

5" (fits Big Blue housings) Filtration Rating 10 Micron Filter Media NSF 61 Certified Coconut Shell GreenCarbon PAC Flow Rate 3 GPM at 4

Chlorine will damage thin-film composite membranes within hours

SMC (6850490) 685 Hastelloy Poly Check Valve 1/2" NPT 20 inch x 4.5 inch Big Blue Filters2700 Valve closes automaticallySMC Professional Grade SMC 685 Hastelloy Poly Check Valve 1 2" NPT Polypropylene inline check valve with Viton seals and Hastelloy springs for reliable backflow prevention in demanding water treatment applications Model 6850490 125 PSI WOG Chemical Resistant WHY IT WORKS Built for Corrosive Environments Hastelloy Spring Corrosion resistant Hastelloy spring maintains consistent closing force even in aggressive chemical environments where standard