Honeywell Thermal Solutions FSG L404F1409 Pressure and Limit ControllerMeet the Honeywell Thermal Solutions FSG L404F1409 Pressure and Limit Controller, a reliable safety device for steam, air, and noncorrosive fluids. With an adjustable subtractive differential and a diaphragm operator, it delivers precise control and repeatable limits across tough industrial environments. Designed for durable performance, this unit supports an operating pressure range of 2 to 15 PSI and a differential range of 2 to 6 PSI, ensuring

and wiring in residential or light commercial systems

simplifying installation in standard piping runs

55–85 Deg F (setting)

and a low-water indicating light to alert operators at a glance

consistent venting

Compatible with Defender Safety System models MI403S

Fit: Bradford White LD30R

making it an excellent choice for commercial-grade controls

UL/CSA/ANSI NSF 372

and timing is 45 seconds per actuation

Trust AO Smith for durable water heater components backed by quality engineering and industry-standard safety features

Add this burner assembly kit to your repair toolkit and keep your AO Smith natural gas water heater operating at peak efficiency