Injector Gray PVC #3 Nozzle and Throat SET

Commonly used in Fleck valve systems that use Potassium Permanganate or Chlorine to regenerate.

NOTE: # 2 Gray ( Grey ) PVC is commonly used in residential sized ( tanks 8" - 12" ) systems that use Potassium Permanganate ( or in some cases liquid chlorine / bleach ) as the "Regenerant" that is drawn into the Valve Head.
These are either Iron Filters using Greensand, or Carbon filters that "regenerate" with the chlorine / bleach solution.
And these PVC versions can last / hold up 3 - 4 times longer than the standard plastic Nozzle & Throats used in water softener ( Brine / salt water ) applications.

The # 3 Gray PVC is only used for larger tank diameters of 13 - 16 inches, and that would be a light commercial application.