Fuel Sample Valve is designed to simplify installation and make fuel checks a snap! Provides a duplicate 1/8 NPT port on the valve for installation of fuel pressure gauge or pressure sensor transducer. The ‘dual action’, spring loaded safety valve keeps the valve sealed when unlocked and rotates into a locked position for racing. When a fuel sample is required, rotate to the unlocked position, press for fuel sample and release, re-lock the valve and go race.