Water Control Valve Kit With O-Ring

RTG20329AV Water Control Valve Kit – Precision Flow Regulation for Rheem Tankless Units

The Rheem RTG20329AV is an original equipment replacement water control valve assembly engineered for select Rheem tankless gas water heaters. This kit includes the water flow valve and factory O-ring, both essential to regulating inlet water pressure and flow to maintain consistent outlet temperature and system performance.

As a key component in the water path, the RTG20329AV valve precisely controls flow volume, enabling the burner system to adjust output based on demand. The result is accurate modulation and efficient heat exchange across a range of flow rates, minimizing thermal fluctuation and protecting against scale formation from overheated surfaces.

Professional Features and Performance Advantages

• OEM-Fit Control Valve – Direct replacement for original water control valve; no field modifications required.
• Flow Modulation Support – Enables the system to balance temperature and flow in real-time, reducing wear on internal components.
• Prevents System Faults – A malfunctioning flow valve is a common cause of ignition delay, flow errors, or temperature instability.
• Includes Factory O-Ring – Ensures leak-tight installation at the connection interface without added sealant or modification.

Technical Details

• Part Number: RTG20329AV
• Function: Water flow control valve assembly
• Included Components: Valve body, O-ring
• Application: Rheem tankless gas water heaters (refer to technical documentation for compatibility)

Installation Guidelines

Installation of the RTG20329AV should be performed by a licensed plumber or HVAC technician with knowledge of Rheem tankless systems. Proper sealing, alignment, and torque are essential to prevent leakage or system shutdown. Ensure unit power and gas supply are disconnected before disassembly. Once installed, verify proper inlet flow and outlet temperature behavior through system diagnostics.

For the Trade

• Service Techs: Replace as part of annual maintenance if unit shows delayed ignition, inconsistent temperature, or valve-related error codes.
• Contractors: Keep this kit stocked for on-demand replacement during tankless service calls or warranty work.