Rinnai Tankless RX water quality limits
Rinnai Tankless RX water quality limits: reference table for the tankless water heater (SENSEI RX/CX series): a quick-reference table with notes.
Rinnai Tankless RX water quality limits table
| Contaminant | Maximum level |
|---|---|
| Total hardness | Up to 200 mg/L |
| Aluminum | Up to 0.2 mg/L |
| Chlorides | Up to 250 mg/L |
| Copper | Up to 1.0 mg/L |
| Dissolved CO2 | Up to 15.0 mg/L |
| Iron | Up to 0.3 mg/L |
| Manganese | Up to 0.05 mg/L |
| pH | 6.5 to 8.5 |
| TDS | Up to 500 mg/L |
| Zinc | Up to 5 mg/L |
How to use the Rinnai Tankless RX water quality limits table
Find your exact model in the first column and read across the row. Values in the Rinnai Tankless RX water quality limits table are a summary for quick reference; the rating plate on the unit and the manufacturer's manual for your model always decide. If your model is not listed, or a value looks different from what you see on the unit, check the manual before changing anything.
Notes
- Water damage beyond these limits is not covered by warranty.
Applies to: RX199i, RX180i, RX160i, RX130i, RXP199i, RXP160i (indoor)
Rinnai models this applies to
RX130iRX160iRX180iRX199iRXP160iRXP199i
Rinnai Tankless Water Heater error codes →
Source: Rinnai SENSEI RX Residential Installation and Operation Manual (100000839(03)), Table 4 Water Quality Guidelines, p.11. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.