Hydraulic system for working machine

A hydraulic system for a working machine, comprising:

• a hydraulic pump to output an operation fluid;
• a first hydraulic apparatus to be activated by the operation fluid;
• a second hydraulic apparatus other than the first hydraulic apparatus, the second hydraulic apparatus being configured to be activated by the operation fluid;
• a first operation valve to control the operation fluid to be supplied to the first hydraulic apparatus;
• a second operation valve to control the operation fluid to be supplied to the second hydraulic apparatus;
• a first fluid tube connecting the first operation valve to the first hydraulic apparatus;
• a second fluid tube connecting the first operation valve to the second hydraulic apparatus;
• a third fluid tube connecting the first fluid tube to the second fluid tube;
• and
• an outputting fluid tube connected to any one of the first operation valve and the second operation valve and configured to output the operation fluid supplied from any one of the first fluid tube and the second fluid tube.