Dual flush handle control

1. A rotary handle assembly for a dual flush toilet system, comprising:

a flush stop;

a handle lever configured to rotate about an axis;

a handle switch configured to extend through a surface of the handle lever from an unextended position to an extended position; and

a restriction arm configured to engage the handle switch at a proximal end,

a distal end of the restriction arm configured to engage the flush stop after a first rotation about the axis when the handle switch is in the unextended position and to engage the flush stop after a second rotation about the axis when the handle switch is in the extended position.

2. The rotary handle assembly of claim 1 , wherein the restriction arm is configured to engage the flush stop at the distal end to restrict rotation of the handle lever.

3. The rotary handle assembly of claim 1 , wherein the handle lever further comprises a shaft extending parallel to the axis.

4. The rotary handle assembly of claim 3 , wherein the shaft passes through a mounting sleeve, the shaft configured to engage with a linkage assembly of an actuation control box of the dual flush toilet system.

5. The rotary handle assembly of claim 4 , wherein the mounting sleeve couples to the actuation control box via a spring-loaded clip assembly.

6. The rotary handle assembly of claim 4 , wherein the mounting sleeve comprises at least one alignment tab configured to align the mounting sleeve with the actuation control box.

7. The rotary handle assembly of claim 4 , wherein the mounting sleeve comprises a tank shoulder, an alignment element, and a shaft sleeve.

8. The rotary handle assembly of claim 7 , wherein the mounting sleeve is inserted through an opening in a wall of a toilet tank and the tank shoulder engages an outer surface of the wall.

9. The rotary handle assembly of claim 7 , wherein the flush stop is located on the tank shoulder.

10. The rotary handle assembly of claim 1 , wherein the handle switch comprises a first end configured to extend outward from the handle lever and a widened surface on a second end configured to engage the proximal end of the restriction arm.

11. The rotary handle assembly of claim 1 , wherein the rotary handle assembly is configured to restrict rotation of the handle lever to a first amount when the handle switch is held in the unextended position and to restrict rotation of the handle lever to a second amount otherwise.

12. The rotary handle assembly of claim 11 , wherein a quick flush of the dual flush toilet system is initiated when the handle lever is rotated by the first amount and a full flush of the dual flush toilet system is initiated when the handle lever is rotated by the second amount.

13. The rotary handle assembly of claim 11 , further comprising a spring configured to restore the handle lever to a neutral position.

14. The rotary handle assembly of claim 1 , wherein a mounting sleeve is configured to detachably connect to an actuation control box of the dual flush toilet system, the actuation control box configured to translate a rotational motion of the handle lever to initiate a flush of the dual flush toilet system.

15. The rotary handle assembly of claim 1 , wherein the handle lever further includes a pin, the restriction arm configured to pivot about the pin in response to rotation of the handle lever.

16. The rotary handle assembly of claim 1 , further comprising a spring mechanism configured to retract the handle switch into the handle lever from the extended position to the unextended position.