Drive Cam - Determines the order of regeneration steps a valve goes through. Cams are usually color coded on each valve model.

Brine Side Cam - Determines when the brine valve opens or closes for filling or drawing brine.

Double Backwash Cam - Allows a second backwash after brining (see Valve Overview Chart for which models this option is available).

*Exception for 3150/3900 where Drive Cam and Brine Side Cam are combined.