SMC 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 systems, filtration manifolds, and pump discharge lines.
SPECIFICATIONS
SMC 6540090 Technical Details
| Model Number | SMC 6540090 |
| Series | 815 Series |
| Body Material | Brass |
| Seal Material | BUNA (Nitrile) |
| Inlet Connection | 1/2" FNPT |
| Outlet Connection | 1/2" FNPT |
| Function | Prevents backflow, maintains system pressure |
COMPATIBILITY
Where This Valve Installs
The SMC 6540090 brass check valve fits any water filtration or treatment system with 1/2" NPT male threaded ports. Common applications include reverse osmosis system permeate lines, booster pump discharge protection, storage tank connections, and filtration manifold assemblies where backflow prevention is required. BUNA seals handle standard municipal water temperatures and pressures without degradation.
