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Proper Hydraulic Fittings for the Garmin GHP Autopilot Pumps
When installing the pump for GHP Autopilots, it is important to know what type of fittings the pump uses.
1.0L Compact Pump
The ports of the 1.0L pump manifold are 1/4" NPT Female ports.
1.2L / 2.0L Pumps
The fittings directly off the manifold of 1.2L and 2.0L pumps are ORB -5 connections. Pumps manufactured before 2018 had 1/4" NPT ports on the pump and also came with 1/4" NPT to 3/8" compression adapters.
2.1L Pump
The 2.1L Pump is threaded for ORB -6 fittings on ports C1/H1/C2/H2 and threaded for ORB -4 for the return port. The Pump comes with three pre-installed adapters on the manifold, for a standard three hose installation, that adapts the ORB fittings to female 1/4" NPT.
SmartPump
The SmartPump is threaded for ORB -6 fittings on ports C1/H1/C2/H2 and threaded for ORB -4 for the return port. The Pump comes with three pre-installed adapters on the manifold, for a standard three hose installation, that adapts the ORB fittings to female 1/4" NPT.
SmartPump V2
The SmartPump V2 is threaded for ORB -5 on ports C1/H1/C2/H2 and for the return port. The pump comes with three pre-installed adapters on the manifold, for a standard three hose installation, that adapts the ORB -5 ports female 1/4" NPT.
Note: The top or side ports can be used interchangeably with the 1.2, 2.0, 2.1 Liter Pumps as well as the SmartPump