SMC (6850490) 685 Hastelloy Poly Check Valve 1/2" NPT 20 inch x 4.5 inch Big Blue Filters2065 and check for leaks around

and check for leaks around the housing o-ring

heavy metals like lead and mercury

Immerse the RO-1 sensor in the source water sample and read the ppm/TDS value on the red-blue color scale

Lubricate with food-grade silicone

5" or 20" cartridge positions for high-volume commercial water treatment

SMC (6850490) 685 Hastelloy Poly Check Valve 1/2" NPT 20 inch x 4.5 inch Big Blue Filters2065 and check for leaks aroundSMC 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