The Bendix MV-3 Series 3/8" PTC Supply Port Dash Valve is designed to provide reliable air control for trailer service, tractor protection, trailer park only, system park and tractor park only. This valve is housed in a single body that accommodates dual circuit supply through a double check valve, allowing it to receive air supply from the primary or the secondary service reservoir, whichever is at the higher pressure. This valve is engineered to offer quick and hassle free installation and maintenance, making it an ideal choice for any air control system. With its durable construction and reliable performance, it is the perfect choice for any air control system. FleetPride is your First Click in Heavy Duty®.