Check Valve - Fan

RTG20319CL Fan Check Valve – Directional Airflow Component for Rheem Tankless Units

The Rheem RTG20319CL is a factory-specified check valve designed for integration within the combustion air pathway of compatible Rheem tankless gas water heaters. Its primary function is to regulate directional airflow in the blower/fan assembly, preventing reverse flow that may impact burner operation or create pressure imbalance within the sealed combustion system.

This valve is essential for maintaining correct airflow dynamics, particularly during ignition and modulation phases. It is constructed for long-term use in high-temperature, high-humidity environments and should only be used as a direct replacement in approved Rheem systems.

Component Function

• Prevents backdrafting within the combustion fan circuit
• Ensures unidirectional air movement through intake and exhaust system
• Maintains manufacturer-specified pressure conditions during operation

Technical Specifications

• Part Number: RTG20319CL
• System Role: Airflow check valve (fan path)
• Compatibility: Select Rheem tankless gas water heaters
• Material: High-temperature-resistant polymer and seal design

Installation Notes

Installation requires removal of the fan assembly cover and routing of the check valve in-line with manufacturer-designated airflow orientation. Correct seating and gasket integrity must be verified to avoid loss of combustion chamber pressurization or fan efficiency. This task is suited for licensed contractors familiar with sealed combustion appliances.

Reinstallation of any removed seals, ducts, or housings should follow Rheem service bulletin torque and alignment specifications. Failure to correctly install this valve may result in operational faults or system lockouts.

Use Cases

• Replacement of a failed or deformed internal check valve
• Resolution of airflow-related error codes (e.g., vent pressure errors)
• Service maintenance in systems with performance inconsistencies

Contractor Considerations

• Check valve is non-serviceable—replace in full if degraded
• Verify that replacement matches unit model and fan revision
• Inspect associated fan blades, housing, and motor for related wear