Abstract: A toilet flush system for use in a toilet tank. In one embodiment, the toilet flush system includes: a handle system, and a dual flush adapter having a hollow interior. The dual flush adapter defines first and second apertures and an adapter outlet, the dual flush adapter further comprises first and second flush valves. The first and second flush valves reversibly seal the first and second apertures. The first aperture is located proximal to the adapter outlet and below the second aperture. The first and second flush valves are in fluid communication with the adapter outlet. The handle system comprises a first handle and a second handle. The first and second handles are arranged such that they rotate independently of each other about a common axis of rotation. Rotating the first and second handles respectively open the first and second flush valves to provide a short and long flush.