Needle valve components pre-assembled on the venturi. This assembly allows the detergent solution to enter the water stream. If detergent will not dispense, clean or replace this assembly if you have followed all these steps and the problem persists:
- You have backflushed: M76 or M2000, M70, M65
- The tank is clean
- All hose connections are correct
- The K0264 Needle Valve components and venturi are clean and clear of obstructions