SMC (6540090) 815 Series Brass Check Valve ; 1/2" FNPT x 1/2" FNPT BUNA H2O International (SH-CP-1) Shower Filters - Single Spray W/KDF; CHROME ✓ NSF 61 Certified Coconut

✓ NSF 61 Certified Coconut Shell Carbon ✓ FDA Approved Materials ✓ California Prop 65 Compliant ✓ Direct Replacement for 2

Using genuine Fleck seals ensures proper durometer and chemical resistance for long-term reliability in high-hardness water applications

Replace diaphragms and seals

remove and flip the HHC cartridge 180 degrees before reinstalling

Dual-gradient layers

SMC (6540090) 815 Series Brass Check Valve ; 1/2" FNPT x 1/2" FNPT BUNA H2O International (SH-CP-1) Shower Filters - Single Spray W/KDF; CHROME ✓ NSF 61 Certified CoconutSMC 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