OTC Tools OTC 5630 Fuel Pressure Tester Kit. Quickly and easily locate any malfunctioning fuel system component, including fuel filters, pressure regulators, fuel lines, and fuel pumps without removing it from the vehicle. Features and benefits: Large, easy-to-read 0100 psi scale, 0700 kPa. Solid brass fittings. Pressure relief valve for safe, clean testing. Availability: Email for product availability.