Flapper - Check Valve
1 Available At All US Supply Locations
RTG20319CM Flapper Check Valve – Flow Control Component for Rheem Tankless Units
The Rheem RTG20319CM is a factory-original check valve flapper used in the water inlet assembly of select Rheem tankless gas water heaters. Its primary function is to prevent reverse flow through the system’s internal piping, ensuring proper directional flow and maintaining correct operating pressure during idle and active heating cycles.
Constructed from heat- and chemical-resistant materials, this valve is designed for long-term use in both residential and light commercial systems where system backpressure control is required. It installs directly into designated valve housings and should only be used on models approved by the manufacturer.
Functional Role
- Prevents backflow of heated or stagnant water into cold water supply lines
- Maintains directional flow integrity through system inlet assembly
- Assists in pressure regulation during system startup and shutdown
Specifications
- Part Number: RTG20319CM
- System Compatibility: Select Rheem tankless gas water heaters
- Component Type: Mechanical check valve (flapper style)
- Material: Thermoplastic and stainless internal hinge
Installation Notes
Installation requires shutdown and depressurization of the water heater system. The valve is seated internally and may require removal of the inlet manifold or valve body, depending on model configuration. Gasket integrity and flow orientation should be verified before reassembly. This work should be performed by qualified service technicians familiar with tankless unit service procedures.
Use Cases
- Replacement of worn, blocked, or degraded internal check valves
- Correction of flow direction issues within the cold water inlet
- Restoration of proper pressure control and startup response
Contractor Guidelines
- Always verify model compatibility before installation
- Inspect inlet housing for scale buildup or distortion prior to installing replacement valve
- Follow Rheem torque and alignment specifications for reassembly
Specifications
| Weight | 5.000000 |
|---|---|
| Height | 5 |
| Length | 10 |
| Width | 5 |
| Brand | Rheem |
| Manufacturer Part Number | RTG20319CM |
| Item Type | Water Heater Parts |
| Item Returns | This item can be returned |