SMC (6540090) 815 Series Brass Check Valve ; 1/2" FNPT x 1/2" FNPT BUNA 10 inch x 4.5 inch Big Blue Filters2055 Designed for Chemical Dosing in

Designed for Chemical Dosing in Water Treatment

or undersized plumbing by tracking flow rate changes over time

Built with a clear sump for visual inspection and a pressure-relief button

Service & Cleaning Schedule

SMC (6540090) 815 Series Brass Check Valve ; 1/2" FNPT x 1/2" FNPT BUNA 10 inch x 4.5 inch Big Blue Filters2055 Designed for Chemical Dosing inSMC 6540090 815 Series Brass Check Valve with BUNA Seal 1 2" FNPT threaded brass check valve prevents backflow in residential and commercial water filtration systems Brass Construction BUNA Seals 1 2" FNPT Ports 815 Series The SMC 815 Series brass check valve uses a BUNA elastomer seal to maintain one way flow in pressurized water lines. Threaded 1 2" female NPT ports on both inlet and outlet make installation straightforward in reverse osmosis