기능

• Eliminates the popping sound of drain water caused by the backflow of outside air due to negative pressure such as ventilation.
• It cuts odor intrusion into the room.
• Prevents "bumping" due to backflow of water.
• Prevents outside air (Hot air in summer and cold air in winter) from entering drain hoses installed in high-rise condominiums, airtight houses, etc., and is effective for energy-saving operation.