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The AO SMITH 100187862 is an aluminum exhaust and condensate elbow designed for use in heating system venting applications. This fitting redirects flue exhaust and manages condensate drainage at a change of direction within a vent run. The 3-inch diameter matches common residential and light-commercial venting configurations. Licensed HVAC technicians and plumbers install this component during new installations and service replacements where a directional transition is required in the exhaust or condensate line.
This elbow is intended for heating applications where a directional change in the exhaust or condensate piping is needed. It is suited for installation in systems that produce condensate as part of the flue gas management process, such as high-efficiency heating equipment that requires proper drainage routing alongside exhaust venting. The aluminum construction is appropriate for the corrosive conditions associated with condensate handling.
Designed as an OEM-style replacement elbow for heating system exhaust and condensate venting assemblies requiring a 3-inch fitting.
Installation should be performed by a licensed HVAC technician or plumber in accordance with the equipment manufacturer's instructions and applicable local mechanical codes. Shut down and de-energize the heating unit completely before servicing any venting components. Ensure all joints are properly sealed to prevent flue gas leakage and that condensate drain routing maintains correct slope for drainage. Refer to the appliance installation manual for approved venting materials and configuration requirements.
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