Spray Disk Leaking

Somewhere within the spray system it is not getting shut off properly.

Cause:

1. The number 1 cause of this problem is the anti-leak valve core and spring which is located where the arm hose meets the flow meter hose. 
2. Imperfections in the spinner disk or not properly put on and causing a sealing issue. 
3. Centrifugal motor lower cover could have an imperfection.

Diagnosing:

1. Check to make sure the anti-leak core and spring are inserted. 
2. Swap them with the other side to see if the problem switches sides.
3. Take off the spinner disk and make sure it is pushed up and sealed when reinserting.

Solutions:

1. The most common issue is needing an extra spring or a new anti-leak valve core and spring.
2. The next solution would be a new spray disk.
3. Third would be a new lower cover
4. If none of these fix issues, follow tubing and check for imperfections. 

Conclusion:

Usually this is a simple cheap fix with the valve core and spring.