Procedure
Install Fuel Demand Valve (FDV) with Pressurized Fuel Tank
1. Install the fuel demand valve (FDV) in the fuel hose between the pressurized fuel tank and the engine. 2. Verify the FDV is oriented correctly; the manual release (push-in button) should be accessible for emergency bypass in case of fuel blockage. 3. Confirm vent/water drain holes on the FDV body are unobstructed.