SMC 685 Series
PVC NSF Check Valve (6850090) – Pack of 2
Prevent backflow in your RO system with reliable 1/2" FNPT check valves built to NSF standards
NSF Certified
PVC Body
Buna Seal
Pack of 2
The SMC 6850090 check valve is a simple, critical component that prevents reverse water flow in your filtration system. This NSF-certified valve features durable PVC construction with a Buna-N seal, designed for reliable one-way flow control in residential and commercial applications.
SPECIFICATIONS
Technical Details
| Model Number | SMC 6850090 |
| Series | 685 Series |
| Connection Size | 1/2" FNPT x 1/2" FNPT |
| Body Material | PVC |
| Seal Material | Buna-N (Nitrile) |
| Certification | NSF Certified |
| Quantity | Pack of 2 |
COMPATIBILITY
Where It Fits
The SMC 6850090 check valve works with most reverse osmosis systems, water filtration setups, and plumbing applications requiring 1/2" FNPT threaded connections. Common installation points include between the RO membrane and storage tank, after booster pumps, or anywhere backflow prevention is needed. The PVC body and Buna seal are compatible with chlorinated water and standard municipal water supplies.
