Ruud tank water heaters need standard tank maintenance. Ultra Series Tankless needs annual descaling. Professional Hybrid adds air filter cleaning.
Annual checklist — tank units
- Test T&P valve — lift handle, verify discharge, reseat
- Flush the tank — drain 3-5 gallons; full flush every 2 years (annual in hard water)
- Inspect the anode rod — year 3, then every 2 years
- Inspect venting — atmospheric draft / power vent termination
- For power vent: verify fan starts/stops with thermostat call
- Clean intake screen on FVIR-equipped gas units
Annual checklist — Professional Hybrid
- All tank tasks above
- Clean air filter on top of unit — vacuum monthly
- Inspect condensate drain
- Verify mode setting — should be Hybrid
- Listen for compressor noise — bearing changes indicate end-of-life
Annual checklist — Ultra Series Tankless
- Flush the heat exchanger — vinegar or commercial descaler
- Clean inlet water filter
- Clean air inlet filter
- Inspect vent termination
- Inspect condensate trap
- Verify gas pressure (every 2-3 years)
- Test pressure relief valve if installed inline
Frequency by water hardness
| Task | Soft (<7 gpg) | Hard (>11 gpg) |
|---|---|---|
| Anode rod replacement | Year 5-7 | Year 3-4 |
| Tank sediment flush | Every 2 years | Annually |
| Tankless heat exchanger descale | Every 24 months | Every 12 months |
Warranty impact
Heavy scale at claim time = denied claim. Keep dated receipts and photos.
Bottom line
Standard tank: annual T&P + flush + anode inspection. Ultra Tankless: annual descaling non-negotiable. Hybrid: add air filter cleaning. Document everything.