Check Valve 100 mm for VMC Sheath

works well in 95mm square meter. Use tape or sealing tape for a tight fit on pipes and vents. The non-return ventilation valve prevents the exhaust air from coming back or the entry of cold outside air. The flaps open when the fan blows the exhaust air outward and automatically close as soon as the airflow stops. The plastic is weather and UV resistant. Operation The check valve diameter 100 mm is completely pushed into the air exhaust pipe. Ideal for upgrading bathroom fans and ventilation systems without a check valve. The flaps should be aligned horizontally for optimal closure. The non-return hood valve fits into all supply and exhaust air systems such as air conditioning systems, dryers, extractor hoods and ventilation systems. Smoothly operating shutters can also be opened by small fans. If the check valve is installed in the rooms, a tape can prevent it from opening easily when closed.