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The RHEEM rtg20329h is an OEM inline water filter assembly designed to protect the internal components of Rheem tankless gas water heater systems. Installed on the cold-water inlet line, it removes sediment, scale, and particulates before water enters the heat exchanger, valves, and flow sensors. Keeping these components free of debris is critical to maintaining consistent flow rates and long-term system performance. The assembly is constructed from durable polymer and corrosion-resistant metal components, built to handle continuous-duty service at standard residential and commercial water supply pressures. This is a factory-specified part, not an aftermarket substitute, and is also cataloged under alternate part number 2041703.
The rtg20329h is intended for use in Rheem RTG-series and compatible tankless gas water heater applications. It mounts inline on the cold-water inlet connection and can be configured with OEM-threaded or compression fittings depending on the specific unit model. Plumbers and HVAC technicians servicing Rheem tankless systems install this filter as part of routine maintenance or as a replacement when flow restriction or contamination is suspected. Water quality conditions that include heavy sediment loads or scale-forming minerals may require more frequent service intervals per the Rheem maintenance schedule.
Designed for use with Rheem RTG-series and compatible tankless gas water heater systems. Verify fitting type against the specific unit model before installation.
Installation should be performed by a licensed plumber familiar with Rheem tankless water heater service procedures. Shut off the cold-water supply and depressurize the system before disconnecting any water line fittings. Follow local plumbing codes, including applicable IPC requirements, for inline component installation and fitting torque procedures. Inspect the filter screen at each service visit and clean or replace it according to Rheem service schedule guidelines or sooner when water quality conditions warrant.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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