25 Laundry Control Unit Plus for OplAdvantage Control Unit Plus provides additional operator benefits, featuring <  19 Formulas <  Auto formula select Solenoid valve <  Plastic cabinet and low voltage power supply <  Check valve between solenoid valve and chemical injection area OplAdvantage Accessories Flush kit for OplAdvantage Flush manifold < Conveniently mounts directly beneath the cabinet < Injection fittings equipped with built-in check valves. Position is adjustable for ease of tubing installation < Optional Flow sensor available Level control and suction devices for OplAdvantage < Optional, externally mounted, empty product alert system available < Fast and safe connections for foot filter and tubing fittings