Prepare your vehicle to be Ready for the Road Ahead™, with the SealCo 3/8" NPT Anti Back Charge Valve that pairs with a wide range of pneumatic systems. This replacement hydraulic part is specially designed for dollies to prevent false charging or back charging of the supply line if the shut-off component on the lead trailer is closed. Manufactured with durable materials for long time use in active and idle engines. FleetPride is your First Click in Heavy Duty®.