valve, air vacuum
Air relief valve: Device that releases air from a pipeline automatically without permitting loss of water or admits air automatically if the internal pressure becomes less than atmospheric.
Authorization Path: 2.4.5.2.20.15
Air relief valve: Device that releases air from a pipeline automatically without permitting loss of water or admits air automatically if the internal pressure becomes less than atmospheric.
Authorization Path: 2.4.5.2.20.15