As a professional-grade liquid line filter drier

1-5/8" refers to the Outside Diameter (OD)

effectively stopping operation if vent blockages or flue gas backflow occur

OEM Compatibility: Exact replacement for HH12ZB160

Robertshaw 41-590 Ignitor As a professional-grade liquid lineThe Robertshaw 41 590 Silicone Carbide Ignitor is a high performance hot surface igniter designed for specialized 120V AC gas fired applications. Engineered as a 41 590 direct replacement for 101, this unit features a flat tip style optimized for rapid heat up and reliable ignition in residential and commercial environments. The core is constructed from high purity, non porous silicone carbide, providing the thermal conductivity and structural