Adding a Check Valve to a Fuel Line
- 1). Locate the fuel line that exits the fuel tank. Designate a section of fuel line close to the tank that can be cut and drained into a gas can while adding the check valve to the fuel line. Place a gas can under the fuel line where the mark is.
- 2). Cut the fuel line and hold both ends over a gas can to drain. If the tank of fuel continues to drain, you will have to install a fuel line check valve while it's draining. Slip a hose clamp over the fuel line then push one of the barbed ends of an inline check valve into the fuel line that is draining. Position the check valve so that fuel stops draining out when inserted.
- 3). Slip a hose clamp over the other fuel line end and insert the other barbed end into the fuel line as far as it will go up the entrance neck of the check valve. Slide the hose clamps over the barbed ends inserted into the fuel line and tighten the clamps securely. Pressurized fuel systems require special fittings to adapt a check valve correctly.
- 4). Position the fuel line in place and prime the fuel system by cranking the engine or activating the fuel pump. Test the check valve fitting before operating. A dry fuel line means you have the added protection a check valve gives you or your local jurisdiction requires.
