A.o. Smith 100109877 Low Gas Pressure Switch Kit

Product Description

The A.O. SMITH 100109877 is a low gas pressure switch kit designed to monitor and verify adequate gas supply pressure in water heating systems. This safety switch detects when gas pressure drops below the required threshold and interrupts the burner circuit to prevent unsafe or incomplete combustion. It is a direct OEM-style replacement component installed by licensed plumbers and HVAC technicians during routine maintenance or failure diagnosis on gas-fired water heaters.

This pressure switch is intended for use in gas-fired water heater applications where continuous burner operation depends on verified gas line pressure. It functions as a safety interlock, typically wired into the control circuit so the burner cannot fire when gas pressure is insufficient. Residential and light commercial installations are the most common service scenarios for this switch.

Key Features

• Monitors gas supply pressure to protect burner operation
• Interrupts burner circuit on low-pressure condition for safety
• OEM-style kit format for direct replacement service
• Designed for gas-type pressure switch applications

Compatibility

Designed as an OEM-style replacement low gas pressure switch for A.O. SMITH gas-fired water heating equipment.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician familiar with gas appliance service. Shut off the gas supply and disconnect power to the water heater before removing or installing the pressure switch. Verify all gas connections are leak-free using an approved leak detection solution before restoring gas flow. Consult local code requirements and the appliance manufacturer documentation for wiring and mounting procedures.

Technical Specifications

• Product Type: Pressure Switch
• Type: Gas

Standard Information

• Brand: A.O. SMITH
• Manufacturer Part Number: 100109877