Oli Lever Block & Control Unit for Oli74 — OL0011973
The Oli OL0011973 is the authentic replacement lever block and central control unit assembly designed specifically for the OLI74 Plus series of concealed in-wall flushing cisterns. This critical component links the flush plate buttons directly to the internal mechanical dump valve mechanism. By restoring smooth, synchronized operational travel, this genuine set ensures a clean full or partial dual-flush cycle and prevents sticky flush buttons or wasted water.
Identification Guide:
MPN: OL0011973 | Range: OLI74 Plus Mechanical | Material: Heavy-Duty Polymer | Internal Ref: FTB13854
Key Features
- Original Fit: Guarantees perfect geometric compatibility inside the narrow OLI74 wall box.
- High Durability: Robust plastic build resists constant high-humidity wear, chemical water scale, and fatigue.
- Easy Alignment: Integrated design incorporates pre-aligned lever mounts for rapid, hassle-free replacement.
- Aesthetic Match: Operates flawlessly behind standard mechanical Oli flush plates like the Better, Slim, or Karisma ranges.
Installation Note
As a complete control unit, this mechanism drops into position through the front access window of the concealed masonry wall box. It is engineered strictly for mechanical push-button installations and will not fit older pneumatic air-tube or cable-operated variants of Oli systems.



