Armstrong 49L90 Pressure SwitchArmstrong 49L90 delivers dependable control with a precise switch pressure of. 47 W. C. This HVAC component is designed for reliable operation in control systems and industrial applications, providing accurate activation thresholds to keep equipment running smoothly. With a compact, durable build, the 49L90 fits easily into control panels and piping networks, reducing wear and cycling. Its engineering supports consistent performance across challenging

As a versatile replacement thermocouple

Designed for HVAC oil burner applications

Blades: 48

Brass body with 3/4" threaded port connections

ideal for demanding environments

ensuring compatibility across a range of systems

Easy installation: A straightforward

A smart choice for homeowners and technicians seeking a trusted

making it a practical choice for field technicians and service shops alike

Designed for general service in car washes

Type: Diaphragm

1/2" NPT male connection for easy installation