Garmin Autopilot Check Valve Kit [010-11203-10]Autopilot Check Valve Kit This check valve kit is used with the 1. 2L and 2. 0L autopilot pumps to isolate them from the steering system when the autopilot is not active. Check valves to prevent slow pressure leak down through the pump while disengaged. Boats with rudder trim tabs (outboard or rudder) that are properly adjusted do not need this check valve kit. Compatible Devices: Reactor 40 Hydraulic Autopilot with GHC 20 Autopilot Instrument Reactor