Square D FSG2J20M4CP Pressure Switch 20/40 Psi

Product Description

The SQUARE D FSG2J20M4CP is a standard pressure switch with integrated low pressure cutoff, designed for use with electrically driven water pump systems. It operates on a 20/40 PSI cut-in/cut-out cycle, switching the pump motor on at 20 PSI and off at 40 PSI. The switch features a 1/4 inch - 18 NPSF internal thread opening for direct connection to pump pressure ports or plumbing tees. Licensed plumbers and pump service technicians install this switch to automate pump cycling and protect systems from low-pressure conditions that could indicate a dry-run or loss-of-prime situation.

This pressure switch is suited for residential and light commercial water well pump installations and booster pump systems. It is appropriate for applications where automatic pump start and stop control is required and where low-pressure cutoff protection is a system requirement. The 1/4 inch - 18 NPSF threaded connection is a standard fitment for pressure switch mounting ports on jet pumps, submersible pump control panels, and pressure tank assemblies.

Key Features

• 20 PSI cut-in and 40 PSI cut-out pressure settings for automatic pump cycling
• Integrated low pressure cutoff protects against dry-run conditions
• 1/4 inch - 18 NPSF internal thread opening for standard pump port connection
• Designed specifically for electrically driven water pump applications
• Sold in a package quantity of 5 units

Compatibility

Designed as an OEM-style replacement pressure switch for electrically driven residential and light commercial water pump systems requiring a 20/40 PSI switching range with low pressure cutoff.

Installation Notes

Installation should be performed by a licensed plumber or pump systems technician. Shut off power to the pump motor and relieve system pressure before removing or installing the pressure switch. Connections must be sealed with appropriate thread sealant rated for potable water if the system serves a drinking water supply. Local plumbing codes and the IPC should be consulted for any pressure system service requirements.

Technical Specifications

• Cut-In Pressure: 20 psi
• Cut-Out Pressure: 40 psi
• Thread Connection: 1/4 inch - 18 NPSF internal thread
• Application: Electrically driven water pumps
• Low Pressure Cutoff: Yes
• Package Quantity: 5 units
• Weight: 5.25 pounds

Standard Information

• Brand: SQUARE D
• Manufacturer Part Number: FSG2J20M4CP