Flushing your tankless system, we recommend Navien or Rinnai
- Fill the bucket half way of hot water, then add vinegar
- Turn off Tankless system (the power button)
- Turn cold (Blue side) main shut off (the larger valves) on Rinnai to off
- Run a hot water tap for 10 seconds and shut off
- Close hot (Red side) main off
- Set up hoses, two houses to pump to cold side of Rinnai arrow on pump pointing in the direction toward the Rinnai, hot into bucket
- Hot hose to the bottom of the bucket, Cold hose to the top of the bucket
- Open service valves (the two small valves facing you)
- Remove filter, clean (rinse), reinstall filter hand tight
- Turn Tankless on – set to 140F
- Turn pump on
- Run for 25mins+ while maintaining the hoses in the bucket (do NOT walk away!)
- Turn the tankless system off, unplug pump, disconnect hoses
- Remove filter, clean, reinstall cleaned filter, with your hand just snug (don’t use pilers to tighten).
- Turn service valves off (First) then turn main valves on
- Turn your tankless on, run hot water for a few minutes
