Square D FSG2J20CP Pressure Switch 20/40 Psi

Product Description

The SQUARE D FSG2J20CP is a standard pressure switch designed for electrically driven water pump systems. It operates on a 20 PSI cut-in and 40 PSI cut-out pressure differential, automatically controlling pump activation and shutoff to maintain consistent system pressure. The switch features a 1/4 inch - 18 NPSF internal thread opening for direct connection to the pump or pressure tank fitting. Licensed plumbers and pump service technicians install this component as part of residential and light commercial water supply systems where automatic pressure regulation is required.

This pressure switch is suited for use with jet pumps, submersible pump controllers, and pressure tank assemblies in potable and non-potable water systems. The 20/40 PSI pressure range is one of the most common settings for residential well pump installations, making this switch a frequent service replacement item in single-family and small multi-family applications.

Key Features

• 20 PSI cut-in / 40 PSI cut-out pressure range for automatic pump control
• 1/4 inch - 18 NPSF internal thread opening for standard pump or tank port connection
• Designed for electrically driven water pump applications
• Standard form factor suited for direct OEM-style replacement
• Sold as individual units (each)

Compatibility

Designed as an OEM-style replacement pressure switch for electrically driven residential and light commercial water pump systems requiring a 20/40 PSI cut-in/cut-out setting with a 1/4 inch - 18 NPSF port connection.

Installation Notes

Installation should be performed by a licensed plumber or qualified pump technician. Shut off power to the pump circuit at the breaker panel and depressurize the system before removing the existing switch. Connections must comply with local plumbing and electrical codes, including applicable IPC and NEC requirements. Do not energize the system until all fittings are secured and verified leak-free.

Technical Specifications

• Pressure Range: 20/40 PSI
• Thread Connection: 1/4 inch - 18 NPSF internal thread
• Application: Electrically driven water pumps
• Weight: 4.5 pounds
• Sold As: Each (EA)

Standard Information

• Brand: SQUARE D
• Manufacturer Part Number: FSG2J20CP