SMC (6940090) 694 Series PVC NSF Check Valve ; 1/4"FNPT x 1/4"FNPT Buna Activated Alumina1459 10 micron Maximum Temperature 120°F

10 micron Maximum Temperature 120°F Weight 1

Keep a spare on hand as these wear components typically last 5-7 years in normal residential service

} Watts Premium Filter Media

and the adjustable thermostat lets you dial in your preferred temperature below the 190°F maximum

and initiate a manual regeneration cycle to verify proper backwash flow

SMC (6940090) 694 Series PVC NSF Check Valve ; 1/4"FNPT x 1/4"FNPT Buna Activated Alumina1459 10 micron Maximum Temperature 120°FThe SMC 6940090 is a 1 4" FNPT threaded PVC check valve from the 694 Series, NSF certified with a Buna N seal for reliable one way flow protection in residential and commercial water systems. This compact valve prevents backflow and protects pumps, filters, and RO membranes from reverse pressure damage. SPECIFICATIONS SMC 694 Series Check Valve Technical Details Model Number SMC 6940090 Series 694 Series Connection Type 1 4" FNPT x 1 4" FNPT Body