Boiler's condensate drain repeatedly clogs, causing water to back up inside the unit.

Safety: Turn OFF power. Condensate is mildly acidic; wear gloves and eye protection.

• 1. Clean trap and line: Remove the condensate trap from the Noritz boiler, flush it with clean water, and clear the drain line with a flexible brush or wet/dry vacuum.
• 2. Correct slope: Ensure the condensate line slopes continuously downward to the drain with no sags.
• 3. Install cleanout: Consider adding a cleanout tee in the condensate line for easier future maintenance.
• 4. Periodic maintenance: Flush the condensate system annually to prevent buildup.