If the small unloader (bleeder) valve on or under your pressure switch leaks constantly AFTER the unit shuts off, replace this part. The check valve is a one-way valve that prevents air from backfeeding from the air tank.SpecificationsNPT - 1/8"  X 27...

Old Part Numbers: 3168Air compressor pressure switch/manifold pipe plug, 1/4"-18 male NPT. A very common hex plug used on countless air compressors, this 1/4" NPT countersunk hex plug installs into any fitting or manifold that has an extra 1/4" female...

Also included in Drain Tube Kit #HU002400AV

This includes part # 42 and 43.

Capacitor. CBB60, E215152, 250V, 50/60Hz, 100UF. Please note: Capacitors can not be returned for a refund unless proven to be defective.