Water Softener - Blend Adjusting Knob

The Blend Adjusting Knob (available on some water softener models) gives the ability to finely adjust the hardness of the treated water leaving the water softener. If slightly harder water is desired than normally delivered by the water softener, the Blend Adjusting Knob can divert a small stream of hard water and blend it with the soft water entering the home. The amount of water diverted is controlled by turning this knob on the end cap of the valve stem. Turn counterclockwise to increase the hardness of treated water (clockwise to decrease the hardness).

 

Once an adjustment is made to the Blend Adjusting Knob, the change in water hardness at the home faucets or shower heads may take several days to be noticed. This delay is due to the large amounts of already conditioned water in the pipes and water heater that must be exchanged before a change in hardness can be noticed.

 

To meet the water softener performance specifications and reduction of barium and radium claims, the adjustable hardness must be kept in the "OFF" position. The "OFF" position is achieved when the Blend Adjusting Knob is fully rotated clockwise until it stops.