Adjustable air regulator assembly for air compressor units that have a 4-port pressure switch (pressure gauge sold separately). 1/4" FPT inlet/outlet, 1/8" FPT port for pressure gauge. If air leaks from the regulator, or when you turn the knob it doesn't...

Use this nylon tube if your air compressor pressure switch has a plastic unloader valve with a quick-connect fitting. Note: sold by the foot (quantity of 1 = 1 foot or 12 inches of tubing).