For contractors performing Armstrong furnace troubleshooting

Complete Kit: Includes the necessary hose and barb fitting for immediate field installation

this unit utilizes a 20-micron filtration pad to capture debris and desiccant fines before they reach the expansion valve

ensuring the circuit interrupts before thermal damage occurs

field technicians often trim these stainless steel probe rods to meet specific low-water cut-off elevations prescribed by the boiler manufacturer

Allanson 421-557 Transformer Els PW 17895 For contractors performing Armstrong furnaceThe Allanson 421 557 is a heavy duty oil burner ignition transformer engineered specifically for Arco and American Standard burners. This iron core transformer utilizes a 120V primary supply to deliver a consistent 10,000V secondary output at 23mA, ensuring a powerful arc for reliable burner ignition in demanding environments. Designed with a mid point ground configuration, the 421 557 features a high silicon steel core and large gauge copper windings