The FASS FPR1001 is a universal adjustable bypass fuel-pressure regulator. It gives outside control of pressure on a diesel or a gas system. Clockwise raises pressure. Counterclockwise lowers it. Lock the jam nut after the set.

Both 1/2-inch NPT side ports are bidirectional. Either one can be the inlet. The third 1/2-inch NPT port is the return, and it wants its own line back to the tank. A 1/8-inch NPT port takes manifold pressure so fuel pressure can rise with boost. A second 1/8-inch port is for a gauge. The mount hardware is in the kit.

It fits a diesel or gas fuel system that needs an external bypass regulator.

Fitment

• Universal diesel and gas
• Adjustable bypass
• 1/2-inch NPT inlet and outlet
• 1/2-inch NPT return
• 1/8-inch NPT boost port
• 1/8-inch NPT gauge port

Do not bottom the adjuster. If pressure will not rise, another regulator is still in the circuit. Check for leaks before the first start.