| plumber | Date: Tu, 07/28/2026, 6:57 AM | Message # 1 |
 Soldier
Group: Administrators
Status: Offline
| How often should a tankless water heater be flushed or descaled?
|
| |
| |
| Guest | Date: Tu, 07/28/2026, 6:58 AM | Message # 2 |
|
Group: Guests
| I had a Navien tankless water heater installed about a year ago. Do I really need to flush it annually, and what happens if I skip this maintenance?
|
| |
| |
| plumber | Date: Tu, 07/28/2026, 6:58 AM | Message # 3 |
|
Soldier
Group: Administrators
Status: Offline
| Yes, annual flushing (descaling) is essential for tankless water heaters, especially in areas with hard water.
Why it’s necessary:
Limescale Buildup: Mineral deposits (calcium and magnesium) accumulate on the heat exchanger elements. Over time, scale acts as an insulator, forcing the system to work much harder to heat water.
Error Codes & Shutdowns: Excessive scale leads to overheating, triggering error codes (e.g., Code 012 or 016 on Navien units) and causing system shutdowns.
Warranty Protection: Most manufacturers (Navien, Rinnai, Bosch) require documented regular maintenance to honor warranty claims on heat exchangers.
What to do: Flush the system with a non-toxic descaling solution or food-grade white vinegar using a submersible pump for 45–60 minutes once every 12 months.
|
| |
| |
