• Spring loaded "snap" check valve replaces filter element on fuel nozzle
• Valve opens when fuel pump pressure reaches 100 PSI and "snaps" shut when fuel pressure drops below 100 PSI
• Stops "smokey" burners at start up and eliminates "shut down" after burn
• Reduces nozzle fouling caused by residual fuel in orifice
• Easy field installation in standard fuel nozzles
• Reduces soot build up in coil