Campbell CW212400AV Pressure Switch Unloader Valve

CW212400AV is a Campbell Hausfeld pressure switch unloader valve designed to accompany the HL031000AV pressure switch on Campbell Hausfeld air compressors. This unloader valve vents residual pressure from the pump head when the compressor shuts off, easing motor restart and reducing inrush current. The HL031000AV is a 125/95 PSI pressure switch, and CW212400AV is the dedicated unloader valve specified for that model in Campbell Hausfeld parts literature. Install as the unloader component of the HL031000AV assembly to ensure consistent cycling and a smoother restart. In some retailer and parts listings, you may see a note about a 1/4" compression unloader fitting used for the check valve line set configured at a 90-degree angle, which aligns with common HL031000AV installations. The CW212400AV part number appears across Campbell Hausfeld manuals and OEM parts references as the replacement unloader valve for HL031000AV-based systems, making it the standard choice when servicing the HL031000AV pressure switch. This part is intended for use in compatible Campbell Hausfeld air compressors and pressure-switch assemblies, offering a direct fit replacement to restore original unloading performance.