Universal Regulator: 4-port, two 1/4" FPT ports, and two 1/8" FPT ports (gauges sold separately here). The regulator controls the amount of air in your air compressor hose. Replace this if you're not able to adjust the PSI to your hose or if it leaks...

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...

Replace this air compressor drain valve if leaking or will not work. Prevent rust from ruining your tank by draining your tank daily. Keep an extra around for a spare. This valve is designed for bubble-tight sealing for small air compressor tanks...

Old Part Numbers: 68-8-6Air compressor compression adapter, 1/2" compression x 3/8" MPT, no lead. 

Old Part Numbers: 31551/4" MPT to 1/8" FPT bushing adapter. If you need a 1/4" MPT fitting, but the part you have is only 1/8" MPT, then use this bushing adapter.

Old Part Numbers: CW208700AJ

Old Part Numbers: ST073919AV, WL012000AV, WL012300AV Filter - All plastic, 1/2" MPT. Uses the 04 element, 2" diameter. Order extra for a backup. Replace this often to keep your pump from damage (especially in dusty environments).