Update your semi truck with enhanced fluid control, with the Power Products 1/2" Brass Ball Valve that ensures you're Ready for the Road Ahead. By using a sophisticated design, this replacement valve is able to regulate the flow of water, fuel, air, and other fluids in numerous types of systems. Built with rugged materials to contain or release high-pressure fluids that have been checked by a gauge. FleetPride is your First Click in Heavy Duty.