SMC (6870090) 687 Series PVC NSF Check Valve ; 3/4"FNPT x 3/4"FNPT Buna
3/4" FNPT PVC Check Valve with Buna Seals
The SMC 6870090 check valve prevents backflow in RO systems, booster pump installations, and pressurized water lines where maintaining directional flow is critical. Install downstream from your pump to eliminate water hammer and protect upstream components from reverse pressure.
Model 6870090 Technical Details
| Model Number | SMC 6870090 |
| Connection Size | 3/4" FNPT x 3/4" FNPT |
| Body Material | Glass-filled polypropylene |
| Seal Material | Viton (Buna compatible) |
| Spring Material | Stainless steel |
| Cracking Pressure | 1 PSI |
| Maximum Pressure | 125 PSI |
| Flow Rate | 17 GPM maximum |
| Max Temperature | 140°F |
| Hex Size | 0.94 inches |
| Weight | 0.11 lbs |
| Orientation | Vertical or horizontal |
| Certification | NSF approved |
Installation Applications
The SMC 6870090 works with standard 3/4" FNPT plumbing connections on reverse osmosis systems, booster pumps, pressure tanks, and water filtration manifolds. The low 1 PSI cracking pressure makes it suitable for systems where flow restriction needs to be minimized, while the 125 PSI rating handles most residential and light commercial applications. Install with flow arrow pointing in the desired direction; the valve can be mounted vertically or horizontally without affecting performance.
3/4" FNPT PVC Check Valve with Buna Seals
The SMC 6870090 check valve prevents backflow in RO systems, booster pump installations, and pressurized water lines where maintaining directional flow is critical. Install downstream from your pump to eliminate water hammer and protect upstream components from reverse pressure.
Model 6870090 Technical Details
| Model Number | SMC 6870090 |
| Connection Size | 3/4" FNPT x 3/4" FNPT |
| Body Material | Glass-filled polypropylene |
| Seal Material | Viton (Buna compatible) |
| Spring Material | Stainless steel |
| Cracking Pressure | 1 PSI |
| Maximum Pressure | 125 PSI |
| Flow Rate | 17 GPM maximum |
| Max Temperature | 140°F |
| Hex Size | 0.94 inches |
| Weight | 0.11 lbs |
| Orientation | Vertical or horizontal |
| Certification | NSF approved |
Installation Applications
The SMC 6870090 works with standard 3/4" FNPT plumbing connections on reverse osmosis systems, booster pumps, pressure tanks, and water filtration manifolds. The low 1 PSI cracking pressure makes it suitable for systems where flow restriction needs to be minimized, while the 125 PSI rating handles most residential and light commercial applications. Install with flow arrow pointing in the desired direction; the valve can be mounted vertically or horizontally without affecting performance.
Original: $18.74
-65%$18.74
$6.56Description
3/4" FNPT PVC Check Valve with Buna Seals
The SMC 6870090 check valve prevents backflow in RO systems, booster pump installations, and pressurized water lines where maintaining directional flow is critical. Install downstream from your pump to eliminate water hammer and protect upstream components from reverse pressure.
Model 6870090 Technical Details
| Model Number | SMC 6870090 |
| Connection Size | 3/4" FNPT x 3/4" FNPT |
| Body Material | Glass-filled polypropylene |
| Seal Material | Viton (Buna compatible) |
| Spring Material | Stainless steel |
| Cracking Pressure | 1 PSI |
| Maximum Pressure | 125 PSI |
| Flow Rate | 17 GPM maximum |
| Max Temperature | 140°F |
| Hex Size | 0.94 inches |
| Weight | 0.11 lbs |
| Orientation | Vertical or horizontal |
| Certification | NSF approved |
Installation Applications
The SMC 6870090 works with standard 3/4" FNPT plumbing connections on reverse osmosis systems, booster pumps, pressure tanks, and water filtration manifolds. The low 1 PSI cracking pressure makes it suitable for systems where flow restriction needs to be minimized, while the 125 PSI rating handles most residential and light commercial applications. Install with flow arrow pointing in the desired direction; the valve can be mounted vertically or horizontally without affecting performance.
