Wet chemical systems are fire suppression systems that use a liquid agent to extinguish fires, particularly in commercial kitchens. These systems are designed to combat fires caused by cooking oils and fats, which can ignite and spread quickly. The liquid agent typically consists of a mixture of water and a special chemical that helps cool the flames and prevent re-ignition. When a fire is detected, the wet chemical system automatically releases the extinguishing agent over the affected area. This helps to smother the flames and cool the surfaces, reducing the risk of fire spreading. Wet chemical systems are often required in establishments like restaurants and cafeterias, where cooking equipment poses a significant fire hazard.