Heavy-Duty Construction: The zinc-plated steel building material resists oxidation and wear in harsh mechanical rooms and plenum environments

The Marley Engineered Products 4520-2030-000 Thermal Fuse is an essential OEM replacement part designed for high-limit temperature protection in QMark and Marley electric heaters

meaning the leads can be connected to either terminal

then apply an additional 1/4 turn with a wrench

Robertshaw 10-028 Orifice Heavy-Duty Construction: The zinc-plated steelThe Robertshaw 10 028 is a precision engineered LP gas orifice designed for specific pilot burner applications requiring a . 008 drill size. This component features 1 4" x 3 16" dimensions, ensuring a secure and leak free fit within compatible pilot assemblies. For service technicians, utilizing the correct Robertshaw pilot orifice is critical for maintaining proper flame stability and preventing nuisance pilot outage issues in liquid propane systems.