Air compressor check valve, 1/2" Compression x 1/2" MPT with 1/8" hole; plug hole if not needed.  https://mastertoolrepair.com/1-8-blk-steel-plug-s-h-100b6e/ If the small unloader (bleeder) valve on or under your pressure switch leaks constantly...

Old Part Numbers: SRV250140Air compressor safety relief valve, 1/4" MPT, 140 PSI. If your valve leaks below the pressure listed on the side of the valve, replace this vital safety feature.Specifications MPT Inlet: 1/4 in. Preset Setting: 140 PSI Max...

Keep your air compressor from sliding all around your vehicle or floor. Order extra for future use.Specifications Height: 3/4"  Diameter: 1-1/2"

Old Part Numbers: 602633 4 Ports on bottom of switch. Preset to come on at 95 and cut off at 125 psi. 1/4" FPT threads and bottom unloader valve for 1/4" line. Can be used for 110 or 220 volt applications. Adjustable. Used on many electric compressors...

1/4" NPT wingnut drain cock. Prevent rust from ruining your air compressor tank by draining your tank daily. Keep an extra around for a spare.Extra DetailsThis was a new check valve installed less than a year ago. Due to the tanks not being drained, this...