Vetus Vacuum valve for waste water tanks (56 mm)

Vetus Vacuum Vent for Wastewater Tanks (56 mm) Vetus vacuum vent designed to add ventilation to wastewater storage tanks. This is an essential safety feature when tanks are emptied by powerful pumps. If insufficient air enters the tank through the vent line, the pumping process could cause the tank to implode. The Vetus VRF56A will prevent this by automatically opening as vacuum pressure increases, allowing air into the tank. The Vetus vacuum vent is essential for wastewater tanks if the vent line is less than 19 mm in diameter, or if the tank holds more than 400 liters and has a vent line less than 38 mm in diameter. The vent is made of synthetic materials and will not corrode.