Sprinkler system

A sprinkler system comprising:

• a main pipe through which a fluid is supplied from an external source;
• a first branch pipe through which the fluid supplied through the main pipe branches off;
• a second branch pipe through which the fluid supplied through the first branch pipe branches off so that the fluid is supplied to a sprinkler;
• a detachable first coupler that interconnects the main pipe and the first branch pipe, or interconnects the first branch pipe and the second branch pipe;
• and
• a second coupler that interconnects the second branch pipe and the sprinkler so that the fluid supplied to the second branch pipe is branched off to flow to the sprinkler extending in a first direction,
• wherein the second coupler comprises a second body part that surrounds a circumference of a branch hole formed in the second branch pipe, a second fixing part that is disposed to be opposite to the second body part with respect to the second branch pipe and configured to fix the second body part to the second branch pipe, and a second gasket part that is disposed between the second body part and an outer circumferential surface of the second branch pipe and configured to prevent the leakage of the branched fluid while being pressed by the second body part,
• wherein the second body part comprises a flange to which the second fixing part is coupled,
• wherein the flange comprises a first cut surface disposed at a lower end of the flange, the lower end being located above the center of the second branch pipe, and the flange further comprises a second cut surface located above the first cut surface to form a step difference between the first cut surface and the second cut surface,
• wherein the second body part comprises a pressing surface extending along the outer circumferential surface of the second branch pipe to press the second gasket part, and wherein the second gasket part and the pressing surface extend to the lower end of the flange,
• wherein the first cut surface is disposed parallel to the second cut surface and has a predetermined length in a second direction perpendicular to the first direction,
• wherein a step surface is provided between the first cut surface and the second cut surface so that the first cut surface and the second cut surface are arranged to form a step,
• wherein the second cut surface extends to a distal end of the flange,
• wherein the second fixing part is fastened to the flange while penetrating the flange such that the second gasket part is pressed while the flange is deformed radially inward, and
• wherein the degree of pressing of the second gasket part by the second body part is configured to increase as a distance from the branch hole increases.