0" WC but the circuit remains open

Industrial Build: Features a UNS CA 844 bronze body and stainless steel stem for superior corrosion resistance and longevity

The Johnson Controls VG7443CT+72CHGA is a 1/2 inch NPT globe valve assembly designed for precision control of hot water

preventing common heating failures caused by blocked vents or faulty draft inducer performance

Rugged Polycarbonate Body: Contaminant-free construction protects the internal snap-acting switch from harsh mechanical room environments

Trane SWT3313 Rollout Switch 319852-301 0" WC but the circuitProtect your heating equipment with the Trane SWT3313 Rollout Switch, a critical OEM safety component engineered for precise thermal monitoring. As a veteran technician, you know that a tripped flame rollout switch is often the first sign of a cracked heat exchanger, soot buildup, or venting issues. This 190F manual reset furnace safety switch is calibrated to immediately break the 24VAC or 120VAC control circuit when internal temperatures exceed safe