The Conbraco 27-402-01 is a professional-grade 1/4" Male NPT brass steam gauge siphon loop engineered for high-pressure steam heating and industrial hydronic systems

If your system requires an insulated probe to prevent nuisance trips from scale buildup

providing a seamless fit for technicians servicing Lennox

though technicians should ensure the core is removed during the brazing process to prevent heat damage to the internal seals

Dual-Voltage Versatility: Native support for 12V and 24V systems reduces inventory complexity for multi-phase projects

Johnson Controls A421ABC-06 Temperature Control 30067439-890 The Conbraco 27-402-01 is aThe Johnson Controls A421ABC 06 is a professional grade electronic temperature control engineered for high performance HVACR applications. As the direct replacement for A419ABC 4, this unit offers a seamless transition for technicians upgrading legacy systems. Operating on 120 240 Vac, it provides a versatile single stage control solution with an SPDT output relay, making it ideal for managing compressors, solenoid valves, or heating elements. This