American Granby FSG2J21M4 Pressure Switch 30/50

Product Description

The AMERICAN GRANBY FSG2J21M4 is a 30/50 pressure switch with low cut-off function, designed for use in water pressure control applications. This switch monitors system pressure and signals the pump to start at 30 psi and stop at 50 psi. The low cut-off feature protects the pump from running dry or operating under unsafe low-pressure conditions. It is typically installed by licensed plumbers or pump service technicians on residential and light commercial well water systems.

This pressure switch is suited for residential and light commercial water supply systems that rely on a submersible or jet pump paired with a pressure tank. The 30/50 cut-in and cut-out pressure range is one of the most common configurations in residential well pump installations. The low cut-off function adds a layer of protection by shutting down the pump when inlet pressure drops below a safe operating threshold.

Key Features

• 30 psi cut-in and 50 psi cut-out pressure settings for standard residential pump control
• Low pressure cut-off function protects pump from dry-run and low-pressure damage
• Designed as a direct replacement for well pump pressure control applications
• Compact form factor suitable for standard pressure switch mounting configurations

Compatibility

Designed as an OEM-style replacement pressure switch for residential and light commercial well water pump systems using a 30/50 psi pressure range with low cut-off protection.

Installation Notes

Installation should be performed by a licensed plumber or pump technician. Shut off power to the pump and pressure system before removing or installing the switch. Follow NEC guidelines for electrical connections at the switch terminals. Do not restore power until all connections are secure and the system is pressurized to a safe operating level.

Technical Specifications

• Cut-In Pressure: 30 psi
• Cut-Out Pressure: 50 psi
• Function: Low pressure cut-off

Standard Information

• Brand: AMERICAN GRANBY
• Manufacturer Part Number: FSG2J21M4