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Square D 9013GH pressure switch, metal housing, 1-port, unloader valve visible

SQUARE D

SQUARE D 9013GH Pressure Switch 125-150PSI 1Port Unload

SKU CH-E6Z1-1S10C

Controls air compressors or water pumps with a 125-150 psi factory setting and 20-40 psi differential

  • TypeLight Switch
  • Factory-set 125/150 psi cut-in/cut-out for air or water systems
  • 20–40 psi adjustable differential suits compressor or pump cycling
  • DPST contacts rated 2 hp at 120 V and 3 hp at 240 V single-phase
  • 3/8 in FNPS port with 1/4 in compression unloader simplifies plumbing
  • NEMA 1 enclosure protects switch in indoor installations

Square D 9013GH Pressure Switch

The Square D 9013GH is a water and air pressure switch designed for air compressors and water pumps. It features a factory on/off setting of 125/150 psi with a differential range of 20 to 40 psi. The unit uses a DPST contact form and carries a NEMA 1 rating.

Replaces worn compressor or pump switches

This switch replaces failed or out-of-calibration pressure controls on existing equipment. The upgrade is worth it when the current switch no longer holds the correct cut-in or cut-out pressures. It covers an adjustable range of 40 to 200 psi for flexible setup.

Suits single and three-phase motor control

The switch handles up to 2 hp at 120 V single-phase, 3 hp at 240 V single-phase, and 5 hp at both 240 V and 480 V three-phase. It is not for buyers who need an integrated unloader valve with a different port configuration or a higher NEMA enclosure rating.

Highlights

  • Factory-set 125/150 psi cut-in/cut-out for air or water systems
  • 20–40 psi adjustable differential suits compressor or pump cycling
  • DPST contacts rated 2 hp at 120 V and 3 hp at 240 V single-phase
  • 3/8 in FNPS port with 1/4 in compression unloader simplifies plumbing
  • NEMA 1 enclosure protects switch in indoor installations

Specifications

BrandSquare D
TypeLight Switch

Questions about this item

What port size and thread type does the 9013GH switch need for mounting?

It mounts through a single 3/8 in FNPS port on the compressor or pump tank.

How is the unloader line connected, and what step is often missed?

A 1/4 in compression fitting attaches the unloader tube; the tube must be fully seated and the nut tightened to stop air bleeding after cut-out at 150 psi.

Which parts wear out and when should they be checked?

The internal DPST contacts and the unloader valve seat degrade over time; inspect them during routine compressor service and replace if the switch fails to open at 150 psi or leaks air continuously after cut-out.

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