Campbell Hausfeld MY000900SV 4 Port Pressure Switch

Campbell Hausfeld MY000900SV is a four-port pressure switch kit designed for Campbell Hausfeld air compressors, delivering a 145 psi cut-in (on) and a 175 psi cut-out (off) to regulate motor operation as tank pressure changes. Documented in Campbell Hausfeld manuals as the pressure switch kit MY000900SV, this four-port configuration supports the typical head-to-tank plumbing found in many unit designs and provides a reliable means to start and stop the pump at the correct pressure points. For smooth restarts and reduced load on the motor, an unloader valve can be added separately (CW000200AV), which vents residual pressure from the head when the switch opens. This combination is commonly used in OEM Campbell Hausfeld setups, ensuring compatibility with replacement parts and long-term serviceability. The 145/175 psi specification aligns with other Campbell Hausfeld four-port switches used across their product line, making it a recognized option for technicians seeking a genuine replacement part built to the brand’s specifications.