This 1-1/2" x 2" boiler safety valve features an extra-heavy bronze body and a B584 alloy 8440 seat

Its compact 12x12-inch footprint allows for precise fitment within the heater compartment

the ICM255 keeps the blower energized for a fixed 60-second OFF delay (often cited as up to 180 seconds in specific legacy configurations like the 1/180-second variant) to maximize thermal efficiency by purging residual air from the ductwork

The Antunes Controls 8021204174 serves as a critical differential air pressure switch designed for precision monitoring in HVACR and industrial process applications

Safety Compliance: Manual reset functionality prevents automatic restarts after a high-limit trip

McDonnell & Miller FS7-4SE Snap Switch Refrigerant This 1-1/2" x 2" boiler1 1 4" NPT, SPDT Snap Switch, Explosion Proof Industrial Liquid Flow Switch with Stainless Steel Body for up to 1000 PSI Max Pressure with Trimmable Stainless Steel Paddles (Part Number 120175) This item does not qualify for free shipping.