Old Part Numbers: 150-1143, 641133Universal Regulator: 4-port, two 1/4" FPT ports, and two1/8" FPT ports (one is plugged). Pressure Gauges sold separately here). The regulator controls the amount of air to your air compressor hose. Replace this if you're...

Air compressor check valve. 3/8" Comp x 1/2" MPT with 1/8" FPT side port.  The check valve is a one-way valve that prevents air from back-feeding from the air tank. If your unit has a hard time restarting when trying to cycle or your pressure switch...

Order this if ordering valve plate or a new head.

Screw, #10-14 x 2.50". This is the screw for the air intake muffler cover (2 used).

Screw (fastener) for the motor/pump shroud.

Screw for the pump cooling fan.